ORM API¶
- Object Relational Mapping module:
Hierarchical structure
Constraints consistency and validation
Object metadata depends on its status
Optimised processing by complex query (multiple actions at once)
Default field values
Permissions optimisation
Persistent object: DB postgresql
Data conversion
Multi-level caching system
Two different inheritance mechanisms
- Rich set of field types:
classical (varchar, integer, boolean, …)
relational (one2many, many2one, many2many)
functional
Models¶
Model fields are defined as attributes on the model itself:
from odoo import models, fields
class AModel(models.Model):
_name = 'a.model.name'
field1 = fields.Char()
Avvertimento
this means you cannot define a field and a method with the same name, the last one will silently overwrite the former ones.
By default, the field’s label (user-visible name) is a capitalized version of
the field name, this can be overridden with the string
parameter.
field2 = fields.Integer(string="Field Label")
For the list of field types and parameters, see the fields reference.
Default values are defined as parameters on fields, either as a value:
name = fields.Char(default="a value")
or as a function called to compute the default value, which should return that value:
def _default_name(self):
return self.get_value()
name = fields.Char(default=lambda self: self._default_name())
API
- class odoo.models.BaseModel[sorgente]¶
Base class for Odoo models.
Odoo models are created by inheriting one of the following:
Model
for regular database-persisted modelsTransientModel
for temporary data, stored in the database but automatically vacuumed every so oftenAbstractModel
for abstract super classes meant to be shared by multiple inheriting models
The system automatically instantiates every model once per database. Those instances represent the available models on each database, and depend on which modules are installed on that database. The actual class of each instance is built from the Python classes that create and inherit from the corresponding model.
Every model instance is a «recordset», i.e., an ordered collection of records of the model. Recordsets are returned by methods like
browse()
,search()
, or field accesses. Records have no explicit representation: a record is represented as a recordset of one record.To create a class that should not be instantiated, the
_register
attribute may be set to False.- _auto = False¶
Whether a database table should be created. If set to
False
, overrideinit()
to create the database table.Automatically defaults to
True
forModel
andTransientModel
,False
forAbstractModel
.Suggerimento
To create a model without any table, inherit from
AbstractModel
.
- _log_access¶
Whether the ORM should automatically generate and update the Access Log fields.
Defaults to whatever value was set for
_auto
.
- _sql_constraints = []¶
SQL constraints [(name, sql_def, message)]
- _register = False¶
registry visibility
- _abstract = True¶
Whether the model is abstract.
Vedi anche
- _transient = False¶
Whether the model is transient.
Vedi anche
- _name = None¶
the model name (in dot-notation, module namespace)
- _description = None¶
the model’s informal name
- _inherits = {}¶
dictionary {“parent_model”: “m2o_field”} mapping the _name of the parent business objects to the names of the corresponding foreign key fields to use:
_inherits = { 'a.model': 'a_field_id', 'b.model': 'b_field_id' }
implements composition-based inheritance: the new model exposes all the fields of the inherited models but stores none of them: the values themselves remain stored on the linked record.
Avvertimento
if multiple fields with the same name are defined in the
_inherits
-ed models, the inherited field will correspond to the last one (in the inherits list order).
- _rec_name = None¶
field to use for labeling records, default:
name
- _order = 'id'¶
default order field for searching results
- _check_company_auto = False¶
On write and create, call
_check_company
to ensure companies consistency on the relational fields havingcheck_company=True
as attribute.
- _parent_name = 'parent_id'¶
the many2one field used as parent field
- _parent_store = False¶
set to True to compute parent_path field.
Alongside a
parent_path
field, sets up an indexed storage of the tree structure of records, to enable faster hierarchical queries on the records of the current model using thechild_of
andparent_of
domain operators.
- _fold_name = 'fold'¶
field to determine folded groups in kanban views
AbstractModel¶
- odoo.models.AbstractModel[sorgente]¶
alias of
odoo.models.BaseModel
Model¶
- class odoo.models.Model(env, ids, prefetch_ids)[sorgente]¶
Main super-class for regular database-persisted Odoo models.
Odoo models are created by inheriting from this class:
class user(Model): ...
The system will later instantiate the class once per database (on which the class” module is installed).
- _auto = True¶
Whether a database table should be created. If set to
False
, overrideinit()
to create the database table.Automatically defaults to
True
forModel
andTransientModel
,False
forAbstractModel
.Suggerimento
To create a model without any table, inherit from
AbstractModel
.
- _abstract = False¶
Whether the model is abstract.
Vedi anche
TransientModel¶
- class odoo.models.TransientModel(env, ids, prefetch_ids)[sorgente]¶
Model super-class for transient records, meant to be temporarily persistent, and regularly vacuum-cleaned.
A TransientModel has a simplified access rights management, all users can create new records, and may only access the records they created. The superuser has unrestricted access to all TransientModel records.
- _transient_max_count = 0¶
maximum number of transient records, unlimited if
0
- _transient_max_hours = 1.0¶
maximum idle lifetime (in hours), unlimited if
0
- _transient_vacuum()[sorgente]¶
Clean the transient records.
This unlinks old records from the transient model tables whenever the
_transient_max_count
or_transient_max_hours
conditions (if any) are reached.Actual cleaning will happen only once every 5 minutes. This means this method can be called frequently (e.g. whenever a new record is created).
Example with both max_hours and max_count active:
Suppose max_hours = 0.2 (aka 12 minutes), max_count = 20, there are 55 rows in the table, 10 created/changed in the last 5 minutes, an additional 12 created/changed between 5 and 10 minutes ago, the rest created/changed more than 12 minutes ago.
age based vacuum will leave the 22 rows created/changed in the last 12 minutes
count based vacuum will wipe out another 12 rows. Not just 2, otherwise each addition would immediately cause the maximum to be reached again.
the 10 rows that have been created/changed the last 5 minutes will NOT be deleted
Fields¶
- class odoo.fields.Field[sorgente]¶
The field descriptor contains the field definition, and manages accesses and assignments of the corresponding field on records. The following attributes may be provided when instantiating a field:
- Parametri
string (str) – the label of the field seen by users; if not set, the ORM takes the field name in the class (capitalized).
help (str) – the tooltip of the field seen by users
invisible – whether the field is invisible (boolean, by default
False
)readonly (bool) –
whether the field is readonly (default:
False
)This only has an impact on the UI. Any field assignation in code will work (if the field is a stored field or an inversable one).
required (bool) – whether the value of the field is required (default:
False
)index (str) –
whether the field is indexed in database, and the kind of index. Note: this has no effect on non-stored and virtual fields. The possible values are:
"btree"
orTrue
: standard index, good for many2one"btree_not_null"
: BTREE index without NULL values (useful when mostvalues are NULL, or when NULL is never searched for)
"trigram"
: Generalized Inverted Index (GIN) with trigrams (good for full-text search)None
orFalse
: no index (default)
default (value or callable) – the default value for the field; this is either a static value, or a function taking a recordset and returning a value; use
default=None
to discard default values for the fieldstates (dict) –
a dictionary mapping state values to lists of UI attribute-value pairs; possible attributes are:
readonly
,required
,invisible
.Avvertimento
Any state-based condition requires the
state
field value to be available on the client-side UI. This is typically done by including it in the relevant views, possibly made invisible if not relevant for the end-user.groups (str) – comma-separated list of group xml ids (string); this restricts the field access to the users of the given groups only
company_dependent (bool) –
whether the field value is dependent of the current company;
The value isn’t stored on the model table. It is registered as
ir.property
. When the value of the company_dependent field is needed, anir.property
is searched, linked to the current company (and current record if one property exists).If the value is changed on the record, it either modifies the existing property for the current record (if one exists), or creates a new one for the current company and res_id.
If the value is changed on the company side, it will impact all records on which the value hasn’t been changed.
copy (bool) – whether the field value should be copied when the record is duplicated (default:
True
for normal fields,False
forone2many
and computed fields, including property fields and related fields)store (bool) – whether the field is stored in database (default:
True
,False
for computed fields)group_operator (str) –
aggregate function used by
read_group()
when grouping on this field.Supported aggregate functions are:
array_agg
: values, including nulls, concatenated into an arraycount
: number of rowscount_distinct
: number of distinct rowsbool_and
: true if all values are true, otherwise falsebool_or
: true if at least one value is true, otherwise falsemax
: maximum value of all valuesmin
: minimum value of all valuesavg
: the average (arithmetic mean) of all valuessum
: sum of all values
group_expand (str) –
function used to expand read_group results when grouping on the current field.
@api.model def _read_group_selection_field(self, values, domain, order): return ['choice1', 'choice2', ...] # available selection choices. @api.model def _read_group_many2one_field(self, records, domain, order): return records + self.search([custom_domain])
Computed Fields
- Parametri
compute (str) –
name of a method that computes the field
Vedi anche
precompute (bool) –
whether the field should be computed before record insertion in database. Should be used to specify manually some fields as precompute=True when the field can be computed before record insertion. (e.g. avoid statistics fields based on search/read_group), many2one linking to the previous record, … (default:
False
)Avvertimento
Precomputation only happens when no explicit value and no default value is provided to create(). This means that a default value disables the precomputation, even if the field is specified as precompute=True.
Precomputing a field can be counterproductive if the records of the given model are not created in batch. Consider the situation were many records are created one by one. If the field is not precomputed, it will normally be computed in batch at the flush(), and the prefetching mechanism will help making the computation efficient. On the other hand, if the field is precomputed, the computation will be made one by one, and will therefore not be able to take advantage of the prefetching mechanism.
Following the remark above, precomputed fields can be interesting on the lines of a one2many, which are usually created in batch by the ORM itself, provided that they are created by writing on the record that contains them.
compute_sudo (bool) – whether the field should be recomputed as superuser to bypass access rights (by default
True
for stored fields,False
for non stored fields)recursive (bool) – whether the field has recursive dependencies (the field
X
has a dependency likeparent_id.X
); declaring a field recursive must be explicit to guarantee that recomputation is correctinverse (str) – name of a method that inverses the field (optional)
search (str) – name of a method that implement search on the field (optional)
related (str) – sequence of field names
default_export_compatible (bool) –
whether the field must be exported by default in an import-compatible export
Vedi anche
Basic Fields¶
- class odoo.fields.Boolean[sorgente]¶
Encapsulates a
bool
.
- class odoo.fields.Char[sorgente]¶
Basic string field, can be length-limited, usually displayed as a single-line string in clients.
- Parametri
size (int) – the maximum size of values stored for that field
trim (bool) – states whether the value is trimmed or not (by default,
True
). Note that the trim operation is applied only by the web client.translate (bool or callable) – enable the translation of the field’s values; use
translate=True
to translate field values as a whole;translate
may also be a callable such thattranslate(callback, value)
translatesvalue
by usingcallback(term)
to retrieve the translation of terms.
- class odoo.fields.Float[sorgente]¶
Encapsulates a
float
.The precision digits are given by the (optional)
digits
attribute.- Parametri
digits (tuple(int,int) or str) – a pair (total, decimal) or a string referencing a
DecimalPrecision
record name.
When a float is a quantity associated with an unit of measure, it is important to use the right tool to compare or round values with the correct precision.
The Float class provides some static methods for this purpose:
round()
to round a float with the given precision.is_zero()
to check if a float equals zero at the given precision.compare()
to compare two floats at the given precision.Example
To round a quantity with the precision of the unit of measure:
fields.Float.round(self.product_uom_qty, precision_rounding=self.product_uom_id.rounding)
To check if the quantity is zero with the precision of the unit of measure:
fields.Float.is_zero(self.product_uom_qty, precision_rounding=self.product_uom_id.rounding)
To compare two quantities:
field.Float.compare(self.product_uom_qty, self.qty_done, precision_rounding=self.product_uom_id.rounding)
The compare helper uses the __cmp__ semantics for historic purposes, therefore the proper, idiomatic way to use this helper is like so:
if result == 0, the first and second floats are equal if result < 0, the first float is lower than the second if result > 0, the first float is greater than the second
- class odoo.fields.Integer[sorgente]¶
Encapsulates an
int
.
Advanced Fields¶
- class odoo.fields.Binary[sorgente]¶
Encapsulates a binary content (e.g. a file).
- Parametri
attachment (bool) – whether the field should be stored as
ir_attachment
or in a column of the model’s table (default:True
).
- class odoo.fields.Html[sorgente]¶
Encapsulates an html code content.
- Parametri
sanitize (bool) – whether value must be sanitized (default:
True
)sanitize_overridable (bool) – whether the sanitation can be bypassed by the users part of the
base.group_sanitize_override
group (default:False
)sanitize_tags (bool) – whether to sanitize tags (only a white list of attributes is accepted, default:
True
)sanitize_attributes (bool) – whether to sanitize attributes (only a white list of attributes is accepted, default:
True
)sanitize_style (bool) – whether to sanitize style attributes (default:
False
)strip_style (bool) – whether to strip style attributes (removed and therefore not sanitized, default:
False
)strip_classes (bool) – whether to strip classes attributes (default:
False
)
- class odoo.fields.Image[sorgente]¶
Encapsulates an image, extending
Binary
.If image size is greater than the
max_width
/max_height
limit of pixels, the image will be resized to the limit by keeping aspect ratio.- Parametri
max_width (int) – the maximum width of the image (default:
0
, no limit)max_height (int) – the maximum height of the image (default:
0
, no limit)verify_resolution (bool) – whether the image resolution should be verified to ensure it doesn’t go over the maximum image resolution (default:
True
). Seeodoo.tools.image.ImageProcess
for maximum image resolution (default:50e6
).
Nota
If no
max_width
/max_height
is specified (or is set to 0) andverify_resolution
is False, the field content won’t be verified at all and aBinary
field should be used.
- class odoo.fields.Monetary[sorgente]¶
Encapsulates a
float
expressed in a givenres_currency
.The decimal precision and currency symbol are taken from the
currency_field
attribute.
- class odoo.fields.Selection[sorgente]¶
Encapsulates an exclusive choice between different values.
- Parametri
selection (list(tuple(str,str)) or callable or str) – specifies the possible values for this field. It is given as either a list of pairs
(value, label)
, or a model method, or a method name.selection_add (list(tuple(str,str))) –
provides an extension of the selection in the case of an overridden field. It is a list of pairs
(value, label)
or singletons(value,)
, where singleton values must appear in the overridden selection. The new values are inserted in an order that is consistent with the overridden selection and this list:selection = [('a', 'A'), ('b', 'B')] selection_add = [('c', 'C'), ('b',)] > result = [('a', 'A'), ('c', 'C'), ('b', 'B')]
ondelete –
provides a fallback mechanism for any overridden field with a selection_add. It is a dict that maps every option from the selection_add to a fallback action.
This fallback action will be applied to all records whose selection_add option maps to it.
- The actions can be any of the following:
”set null” – the default, all records with this option will have their selection value set to False.
”cascade” – all records with this option will be deleted along with the option itself.
”set default” – all records with this option will be set to the default of the field definition
’set VALUE” – all records with this option will be set to the given value
<callable> – a callable whose first and only argument will be the set of records containing the specified Selection option, for custom processing
The attribute
selection
is mandatory except in the case ofrelated
or extended fields.
- class odoo.fields.Text[sorgente]¶
Very similar to
Char
but used for longer contents, does not have a size and usually displayed as a multiline text box.- Parametri
translate (bool or callable) – enable the translation of the field’s values; use
translate=True
to translate field values as a whole;translate
may also be a callable such thattranslate(callback, value)
translatesvalue
by usingcallback(term)
to retrieve the translation of terms.
Date(time) Fields¶
Dates
and Datetimes
are very important fields in any kind of business application.
Their misuse can create invisible yet painful bugs, this section
aims to provide Odoo developers with the knowledge required
to avoid misusing these fields.
When assigning a value to a Date/Datetime field, the following options are valid:
A
date
ordatetime
object.A string in the proper server format:
False
orNone
.
The Date and Datetime fields class have helper methods to attempt conversion into a compatible type:
to_date()
will convert to adatetime.date
to_datetime()
will convert to adatetime.datetime
.
Example
To parse date/datetimes coming from external sources:
fields.Date.to_date(self._context.get('date_from'))
Date / Datetime comparison best practices:
Date fields can only be compared to date objects.
Datetime fields can only be compared to datetime objects.
Avvertimento
Strings representing dates and datetimes can be compared between each other, however the result may not be the expected result, as a datetime string will always be greater than a date string, therefore this practice is heavily discouraged.
Common operations with dates and datetimes such as addition, subtraction or
fetching the start/end of a period are exposed through both
Date
and Datetime
.
These helpers are also available by importing odoo.tools.date_utils
.
Nota
Timezones
Datetime fields are stored as timestamp without timezone
columns in the database and are stored
in the UTC timezone. This is by design, as it makes the Odoo database independent from the timezone
of the hosting server system. Timezone conversion is managed entirely by the client side.
- class odoo.fields.Date[sorgente]¶
Encapsulates a python
date
object.- static start_of(value, granularity)[sorgente]¶
Get start of a time period from a date or a datetime.
- Parametri
value – initial date or datetime.
granularity – type of period in string, can be year, quarter, month, week, day or hour.
- Ritorna
a date/datetime object corresponding to the start of the specified period.
- static end_of(value, granularity)[sorgente]¶
Get end of a time period from a date or a datetime.
- Parametri
value – initial date or datetime.
granularity – Type of period in string, can be year, quarter, month, week, day or hour.
- Ritorna
A date/datetime object corresponding to the start of the specified period.
- static add(value, *args, **kwargs)[sorgente]¶
Return the sum of
value
and arelativedelta
.- Parametri
value – initial date or datetime.
args – positional args to pass directly to
relativedelta
.kwargs – keyword args to pass directly to
relativedelta
.
- Ritorna
the resulting date/datetime.
- static subtract(value, *args, **kwargs)[sorgente]¶
Return the difference between
value
and arelativedelta
.- Parametri
value – initial date or datetime.
args – positional args to pass directly to
relativedelta
.kwargs – keyword args to pass directly to
relativedelta
.
- Ritorna
the resulting date/datetime.
- static today(*args)[sorgente]¶
Return the current day in the format expected by the ORM.
Nota
This function may be used to compute default values.
- static context_today(record, timestamp=None)[sorgente]¶
Return the current date as seen in the client’s timezone in a format fit for date fields.
Nota
This method may be used to compute default values.
- Parametri
record – recordset from which the timezone will be obtained.
timestamp (datetime) – optional datetime value to use instead of the current date and time (must be a datetime, regular dates can’t be converted between timezones).
- Tipo di ritorno
date
- static to_date(value)[sorgente]¶
Attempt to convert
value
to adate
object.Avvertimento
If a datetime object is given as value, it will be converted to a date object and all datetime-specific information will be lost (HMS, TZ, …).
- static to_string(value)[sorgente]¶
Convert a
date
ordatetime
object to a string.- Parametri
value – value to convert.
- Ritorna
a string representing
value
in the server’s date format, ifvalue
is of typedatetime
, the hours, minute, seconds, tzinfo will be truncated.- Tipo di ritorno
- class odoo.fields.Datetime[sorgente]¶
Encapsulates a python
datetime
object.- static start_of(value, granularity)[sorgente]¶
Get start of a time period from a date or a datetime.
- Parametri
value – initial date or datetime.
granularity – type of period in string, can be year, quarter, month, week, day or hour.
- Ritorna
a date/datetime object corresponding to the start of the specified period.
- static end_of(value, granularity)[sorgente]¶
Get end of a time period from a date or a datetime.
- Parametri
value – initial date or datetime.
granularity – Type of period in string, can be year, quarter, month, week, day or hour.
- Ritorna
A date/datetime object corresponding to the start of the specified period.
- static add(value, *args, **kwargs)[sorgente]¶
Return the sum of
value
and arelativedelta
.- Parametri
value – initial date or datetime.
args – positional args to pass directly to
relativedelta
.kwargs – keyword args to pass directly to
relativedelta
.
- Ritorna
the resulting date/datetime.
- static subtract(value, *args, **kwargs)[sorgente]¶
Return the difference between
value
and arelativedelta
.- Parametri
value – initial date or datetime.
args – positional args to pass directly to
relativedelta
.kwargs – keyword args to pass directly to
relativedelta
.
- Ritorna
the resulting date/datetime.
- static now(*args)[sorgente]¶
Return the current day and time in the format expected by the ORM.
Nota
This function may be used to compute default values.
- static today(*args)[sorgente]¶
Return the current day, at midnight (00:00:00).
- static context_timestamp(record, timestamp)[sorgente]¶
Return the given timestamp converted to the client’s timezone.
Nota
This method is not meant for use as a default initializer, because datetime fields are automatically converted upon display on client side. For default values,
now()
should be used instead.- Parametri
record – recordset from which the timezone will be obtained.
timestamp (datetime) – naive datetime value (expressed in UTC) to be converted to the client timezone.
- Ritorna
timestamp converted to timezone-aware datetime in context timezone.
- Tipo di ritorno
datetime
- static to_datetime(value)[sorgente]¶
Convert an ORM
value
into adatetime
value.
- static to_string(value)[sorgente]¶
Convert a
datetime
ordate
object to a string.- Parametri
value (datetime or date) – value to convert.
- Ritorna
a string representing
value
in the server’s datetime format, ifvalue
is of typedate
, the time portion will be midnight (00:00:00).- Tipo di ritorno
Relational Fields¶
- class odoo.fields.Many2one[sorgente]¶
The value of such a field is a recordset of size 0 (no record) or 1 (a single record).
- Parametri
comodel_name (str) – name of the target model
Mandatory
except for related or extended fields.domain – an optional domain to set on candidate values on the client side (domain or string)
context (dict) – an optional context to use on the client side when handling that field
ondelete (str) – what to do when the referred record is deleted; possible values are:
'set null'
,'restrict'
,'cascade'
auto_join (bool) – whether JOINs are generated upon search through that field (default:
False
)delegate (bool) – set it to
True
to make fields of the target model accessible from the current model (corresponds to_inherits
)check_company (bool) – Mark the field to be verified in
_check_company()
. Add a default company domain depending on the field attributes.
- class odoo.fields.One2many[sorgente]¶
One2many field; the value of such a field is the recordset of all the records in
comodel_name
such that the fieldinverse_name
is equal to the current record.- Parametri
comodel_name (str) – name of the target model
inverse_name (str) – name of the inverse
Many2one
field incomodel_name
domain – an optional domain to set on candidate values on the client side (domain or string)
context (dict) – an optional context to use on the client side when handling that field
auto_join (bool) – whether JOINs are generated upon search through that field (default:
False
)
The attributes
comodel_name
andinverse_name
are mandatory except in the case of related fields or field extensions.
- class odoo.fields.Many2many[sorgente]¶
Many2many field; the value of such a field is the recordset.
- Parametri
comodel_name – name of the target model (string) mandatory except in the case of related or extended fields
relation (str) – optional name of the table that stores the relation in the database
column1 (str) – optional name of the column referring to «these» records in the table
relation
column2 (str) – optional name of the column referring to «those» records in the table
relation
The attributes
relation
,column1
andcolumn2
are optional. If not given, names are automatically generated from model names, providedmodel_name
andcomodel_name
are different!Note that having several fields with implicit relation parameters on a given model with the same comodel is not accepted by the ORM, since those field would use the same table. The ORM prevents two many2many fields to use the same relation parameters, except if
both fields use the same model, comodel, and relation parameters are explicit; or
at least one field belongs to a model with
_auto = False
.
- Parametri
domain – an optional domain to set on candidate values on the client side (domain or string)
context (dict) – an optional context to use on the client side when handling that field
check_company (bool) – Mark the field to be verified in
_check_company()
. Add a default company domain depending on the field attributes.
- class odoo.fields.Command[sorgente]¶
One2many
andMany2many
fields expect a special command to manipulate the relation they implement.Internally, each command is a 3-elements tuple where the first element is a mandatory integer that identifies the command, the second element is either the related record id to apply the command on (commands update, delete, unlink and link) either 0 (commands create, clear and set), the third element is either the
values
to write on the record (commands create and update) either the newids
list of related records (command set), either 0 (commands delete, unlink, link, and clear).Via Python, we encourage developers craft new commands via the various functions of this namespace. We also encourage developers to use the command identifier constant names when comparing the 1st element of existing commands.
Via RPC, it is impossible nor to use the functions nor the command constant names. It is required to instead write the literal 3-elements tuple where the first element is the integer identifier of the command.
- CREATE = 0¶
- UPDATE = 1¶
- DELETE = 2¶
- UNLINK = 3¶
- LINK = 4¶
- CLEAR = 5¶
- SET = 6¶
- classmethod create(values: dict)[sorgente]¶
Create new records in the comodel using
values
, link the created records toself
.In case of a
Many2many
relation, one unique new record is created in the comodel such that all records inself
are linked to the new record.In case of a
One2many
relation, one new record is created in the comodel for every record inself
such that every record inself
is linked to exactly one of the new records.Return the command triple
(CREATE, 0, values)
- classmethod update(id: int, values: dict)[sorgente]¶
Write
values
on the related record.Return the command triple
(UPDATE, id, values)
- classmethod delete(id: int)[sorgente]¶
Remove the related record from the database and remove its relation with
self
.In case of a
Many2many
relation, removing the record from the database may be prevented if it is still linked to other records.Return the command triple
(DELETE, id, 0)
- classmethod unlink(id: int)[sorgente]¶
Remove the relation between
self
and the related record.In case of a
One2many
relation, the given record is deleted from the database if the inverse field is set asondelete='cascade'
. Otherwise, the value of the inverse field is set to False and the record is kept.Return the command triple
(UNLINK, id, 0)
- classmethod link(id: int)[sorgente]¶
Add a relation between
self
and the related record.Return the command triple
(LINK, id, 0)
- classmethod clear()[sorgente]¶
Remove all records from the relation with
self
. It behaves like executing theunlink
command on every record.Return the command triple
(CLEAR, 0, 0)
- classmethod set(ids: list)[sorgente]¶
Replace the current relations of
self
by the given ones. It behaves like executing theunlink
command on every removed relation then executing thelink
command on every new relation.Return the command triple
(SET, 0, ids)
Pseudo-relational fields¶
- class odoo.fields.Reference[sorgente]¶
Pseudo-relational field (no FK in database).
The field value is stored as a
string
following the pattern"res_model,res_id"
in database.
- class odoo.fields.Many2oneReference[sorgente]¶
Pseudo-relational field (no FK in database).
The field value is stored as an
integer
id in database.Contrary to
Reference
fields, the model has to be specified in aChar
field, whose name has to be specified in themodel_field
attribute for the currentMany2oneReference
field.
Computed Fields¶
Fields can be computed (instead of read straight from the database) using the
compute
parameter. It must assign the computed value to the field. If
it uses the values of other fields, it should specify those fields using
depends()
.
from odoo import api
total = fields.Float(compute='_compute_total')
@api.depends('value', 'tax')
def _compute_total(self):
for record in self:
record.total = record.value + record.value * record.tax
dependencies can be dotted paths when using sub-fields:
@api.depends('line_ids.value') def _compute_total(self): for record in self: record.total = sum(line.value for line in record.line_ids)
computed fields are not stored by default, they are computed and returned when requested. Setting
store=True
will store them in the database and automatically enable searching.searching on a computed field can also be enabled by setting the
search
parameter. The value is a method name returning a Search domains.upper_name = field.Char(compute='_compute_upper', search='_search_upper') def _search_upper(self, operator, value): if operator == 'like': operator = 'ilike' return [('name', operator, value)]
The search method is invoked when processing domains before doing an actual search on the model. It must return a domain equivalent to the condition:
field operator value
.
Computed fields are readonly by default. To allow setting values on a computed field, use the
inverse
parameter. It is the name of a function reversing the computation and setting the relevant fields:document = fields.Char(compute='_get_document', inverse='_set_document') def _get_document(self): for record in self: with open(record.get_document_path) as f: record.document = f.read() def _set_document(self): for record in self: if not record.document: continue with open(record.get_document_path()) as f: f.write(record.document)
multiple fields can be computed at the same time by the same method, just use the same method on all fields and set all of them:
discount_value = fields.Float(compute='_apply_discount') total = fields.Float(compute='_apply_discount') @api.depends('value', 'discount') def _apply_discount(self): for record in self: # compute actual discount from discount percentage discount = record.value * record.discount record.discount_value = discount record.total = record.value - discount
Avvertimento
While it is possible to use the same compute method for multiple fields, it is not recommended to do the same for the inverse method.
During the computation of the inverse, all fields that use said inverse are protected, meaning that they can’t be computed, even if their value is not in the cache.
If any of those fields is accessed and its value is not in cache,
the ORM will simply return a default value of False
for these fields.
This means that the value of the inverse fields (other than the one
triggering the inverse method) may not give their correct value and
this will probably break the expected behavior of the inverse method.
Automatic fields¶
Access Log fields¶
These fields are automatically set and updated if
_log_access
is enabled. It can be
disabled to avoid creating or updating those fields on tables for which they are
not useful.
By default, _log_access
is set to the same value
as _auto
Avvertimento
_log_access
must be enabled on
TransientModel
.
Reserved Field names¶
A few field names are reserved for pre-defined behaviors beyond that of automated fields. They should be defined on a model when the related behavior is desired:
- Model.name¶
default value for
_rec_name
, used to display records in context where a representative «naming» is necessary.
- Model.active¶
toggles the global visibility of the record, if
active
is set toFalse
the record is invisible in most searches and listing.Special methods:
- toggle_active()[sorgente]¶
Inverses the value of
active
on the records inself
.
- Model.action_archive()[sorgente]¶
Sets
active
toFalse
on a recordset, by callingtoggle_active()
on its currently active records.
- Model.action_unarchive()[sorgente]¶
Sets
active
toTrue
on a recordset, by callingtoggle_active()
on its currently inactive records.
- Model.parent_id¶
default_value of
_parent_name
, used to organize records in a tree structure and enables thechild_of
andparent_of
operators in domains.
- Model.parent_path¶
When
_parent_store
is set to True, used to store a value reflecting the tree structure of_parent_name
, and to optimize the operatorschild_of
andparent_of
in search domains. It must be declared withindex=True
for proper operation.
Recordsets¶
Interactions with models and records are performed through recordsets, an ordered collection of records of the same model.
Avvertimento
Contrary to what the name implies, it is currently possible for recordsets to contain duplicates. This may change in the future.
Methods defined on a model are executed on a recordset, and their self
is
a recordset:
class AModel(models.Model):
_name = 'a.model'
def a_method(self):
# self can be anything between 0 records and all records in the
# database
self.do_operation()
Iterating on a recordset will yield new sets of a single record («singletons»), much like iterating on a Python string yields strings of a single characters:
def do_operation(self):
print(self) # => a.model(1, 2, 3, 4, 5)
for record in self:
print(record) # => a.model(1), then a.model(2), then a.model(3), ...
Field access¶
Recordsets provide an «Active Record» interface: model fields can be read and written directly from the record as attributes.
Nota
When accessing non-relational fields on a recordset of potentially multiple
records, use mapped()
:
total_qty = sum(self.mapped('qty'))
Field values can also be accessed like dict items, which is more elegant and
safer than getattr()
for dynamic field names.
Setting a field’s value triggers an update to the database:
>>> record.name
Example Name
>>> record.company_id.name
Company Name
>>> record.name = "Bob"
>>> field = "name"
>>> record[field]
Bob
Avvertimento
Trying to read a field on multiple records will raise an error for non relational fields.
Accessing a relational field (Many2one
,
One2many
, Many2many
)
always returns a recordset, empty if the field is not set.
Record cache and prefetching¶
Odoo maintains a cache for the fields of the records, so that not every field access issues a database request, which would be terrible for performance. The following example queries the database only for the first statement:
record.name # first access reads value from database
record.name # second access gets value from cache
To avoid reading one field on one record at a time, Odoo prefetches records and fields following some heuristics to get good performance. Once a field must be read on a given record, the ORM actually reads that field on a larger recordset, and stores the returned values in cache for later use. The prefetched recordset is usually the recordset from which the record comes by iteration. Moreover, all simple stored fields (boolean, integer, float, char, text, date, datetime, selection, many2one) are fetched altogether; they correspond to the columns of the model’s table, and are fetched efficiently in the same query.
Consider the following example, where partners
is a recordset of 1000
records. Without prefetching, the loop would make 2000 queries to the database.
With prefetching, only one query is made:
for partner in partners:
print partner.name # first pass prefetches 'name' and 'lang'
# (and other fields) on all 'partners'
print partner.lang
The prefetching also works on secondary records: when relational fields are read, their values (which are records) are subscribed for future prefetching. Accessing one of those secondary records prefetches all secondary records from the same model. This makes the following example generate only two queries, one for partners and one for countries:
countries = set()
for partner in partners:
country = partner.country_id # first pass prefetches all partners
countries.add(country.name) # first pass prefetches all countries
Method decorators¶
The Odoo API module defines Odoo Environments and method decorators.
- odoo.api.model(method)[sorgente]¶
Decorate a record-style method where
self
is a recordset, but its contents is not relevant, only the model is. Such a method:@api.model def method(self, args): ...
- odoo.api.constrains(*args)[sorgente]¶
Decorate a constraint checker.
Each argument must be a field name used in the check:
@api.constrains('name', 'description') def _check_description(self): for record in self: if record.name == record.description: raise ValidationError("Fields name and description must be different")
Invoked on the records on which one of the named fields has been modified.
Should raise
ValidationError
if the validation failed.Avvertimento
@constrains
only supports simple field names, dotted names (fields of relational fields e.g.partner_id.customer
) are not supported and will be ignored.@constrains
will be triggered only if the declared fields in the decorated method are included in thecreate
orwrite
call. It implies that fields not present in a view will not trigger a call during a record creation. A override ofcreate
is necessary to make sure a constraint will always be triggered (e.g. to test the absence of value).One may also pass a single function as argument. In that case, the field names are given by calling the function with a model instance.
- odoo.api.depends(*args)[sorgente]¶
Return a decorator that specifies the field dependencies of a «compute» method (for new-style function fields). Each argument must be a string that consists in a dot-separated sequence of field names:
pname = fields.Char(compute='_compute_pname') @api.depends('partner_id.name', 'partner_id.is_company') def _compute_pname(self): for record in self: if record.partner_id.is_company: record.pname = (record.partner_id.name or "").upper() else: record.pname = record.partner_id.name
One may also pass a single function as argument. In that case, the dependencies are given by calling the function with the field’s model.
- odoo.api.onchange(*args)[sorgente]¶
Return a decorator to decorate an onchange method for given fields.
In the form views where the field appears, the method will be called when one of the given fields is modified. The method is invoked on a pseudo-record that contains the values present in the form. Field assignments on that record are automatically sent back to the client.
Each argument must be a field name:
@api.onchange('partner_id') def _onchange_partner(self): self.message = "Dear %s" % (self.partner_id.name or "")
return { 'warning': {'title': "Warning", 'message': "What is this?", 'type': 'notification'}, }
If the type is set to notification, the warning will be displayed in a notification. Otherwise it will be displayed in a dialog as default.
Avvertimento
@onchange
only supports simple field names, dotted names (fields of relational fields e.g.partner_id.tz
) are not supported and will be ignoredPericolo
Since
@onchange
returns a recordset of pseudo-records, calling any one of the CRUD methods (create()
,read()
,write()
,unlink()
) on the aforementioned recordset is undefined behaviour, as they potentially do not exist in the database yet.Instead, simply set the record’s field like shown in the example above or call the
update()
method.Avvertimento
It is not possible for a
one2many
ormany2many
field to modify itself via onchange. This is a webclient limitation - see #2693.
- odoo.api.returns(model, downgrade=None, upgrade=None)[sorgente]¶
Return a decorator for methods that return instances of
model
.- Parametri
model – a model name, or
'self'
for the current modeldowngrade – a function
downgrade(self, value, *args, **kwargs)
to convert the record-stylevalue
to a traditional-style outputupgrade – a function
upgrade(self, value, *args, **kwargs)
to convert the traditional-stylevalue
to a record-style output
The arguments
self
,*args
and**kwargs
are the ones passed to the method in the record-style.The decorator adapts the method output to the api style:
id
,ids
orFalse
for the traditional style, and recordset for the record style:@model @returns('res.partner') def find_partner(self, arg): ... # return some record # output depends on call style: traditional vs record style partner_id = model.find_partner(cr, uid, arg, context=context) # recs = model.browse(cr, uid, ids, context) partner_record = recs.find_partner(arg)
Note that the decorated method must satisfy that convention.
Those decorators are automatically inherited: a method that overrides a decorated existing method will be decorated with the same
@returns(model)
.
- odoo.api.autovacuum(method)[sorgente]¶
Decorate a method so that it is called by the daily vacuum cron job (model
ir.autovacuum
). This is typically used for garbage-collection-like tasks that do not deserve a specific cron job.
- odoo.api.depends_context(*args)[sorgente]¶
Return a decorator that specifies the context dependencies of a non-stored «compute» method. Each argument is a key in the context’s dictionary:
price = fields.Float(compute='_compute_product_price') @api.depends_context('pricelist') def _compute_product_price(self): for product in self: if product.env.context.get('pricelist'): pricelist = self.env['product.pricelist'].browse(product.env.context['pricelist']) else: pricelist = self.env['product.pricelist'].get_default_pricelist() product.price = pricelist._get_products_price(product).get(product.id, 0.0)
All dependencies must be hashable. The following keys have special support:
company
(value in context or current company id),uid
(current user id and superuser flag),active_test
(value in env.context or value in field.context).
- odoo.api.model_create_multi(method)[sorgente]¶
Decorate a method that takes a list of dictionaries and creates multiple records. The method may be called with either a single dict or a list of dicts:
record = model.create(vals) records = model.create([vals, ...])
- odoo.api.ondelete(*, at_uninstall)[sorgente]¶
Mark a method to be executed during
unlink()
.The goal of this decorator is to allow client-side errors when unlinking records if, from a business point of view, it does not make sense to delete such records. For instance, a user should not be able to delete a validated sales order.
While this could be implemented by simply overriding the method
unlink
on the model, it has the drawback of not being compatible with module uninstallation. When uninstalling the module, the override could raise user errors, but we shouldn’t care because the module is being uninstalled, and thus all records related to the module should be removed anyway.This means that by overriding
unlink
, there is a big chance that some tables/records may remain as leftover data from the uninstalled module. This leaves the database in an inconsistent state. Moreover, there is a risk of conflicts if the module is ever reinstalled on that database.Methods decorated with
@ondelete
should raise an error following some conditions, and by convention, the method should be named either_unlink_if_<condition>
or_unlink_except_<not_condition>
.@api.ondelete(at_uninstall=False) def _unlink_if_user_inactive(self): if any(user.active for user in self): raise UserError("Can't delete an active user!") # same as above but with _unlink_except_* as method name @api.ondelete(at_uninstall=False) def _unlink_except_active_user(self): if any(user.active for user in self): raise UserError("Can't delete an active user!")
- Parametri
at_uninstall (bool) – Whether the decorated method should be called if the module that implements said method is being uninstalled. Should almost always be
False
, so that module uninstallation does not trigger those errors.
Pericolo
The parameter
at_uninstall
should only be set toTrue
if the check you are implementing also applies when uninstalling the module.For instance, it doesn’t matter if when uninstalling
sale
, validated sales orders are being deleted because all data pertaining tosale
should be deleted anyway, in that caseat_uninstall
should be set toFalse
.However, it makes sense to prevent the removal of the default language if no other languages are installed, since deleting the default language will break a lot of basic behavior. In this case,
at_uninstall
should be set toTrue
.
Environment¶
- class odoo.api.Environment(cr, uid, context, su=False, uid_origin=None)[sorgente]¶
The environment stores various contextual data used by the ORM:
cr
: the current database cursor (for database queries);uid
: the current user id (for access rights checks);context
: the current context dictionary (arbitrary metadata);su
: whether in superuser mode.
It provides access to the registry by implementing a mapping from model names to models. It also holds a cache for records, and a data structure to manage recomputations.
>>> records.env
<Environment object ...>
>>> records.env.uid
3
>>> records.env.user
res.user(3)
>>> records.env.cr
<Cursor object ...>
When creating a recordset from an other recordset, the environment is inherited. The environment can be used to get an empty recordset in an other model, and query that model:
>>> self.env['res.partner']
res.partner()
>>> self.env['res.partner'].search([('is_company', '=', True), ('customer', '=', True)])
res.partner(7, 18, 12, 14, 17, 19, 8, 31, 26, 16, 13, 20, 30, 22, 29, 15, 23, 28, 74)
Some lazy properties are available to access the environment (contextual) data:
- Environment.user¶
Return the current user (as an instance).
- Ritorna
current user - sudoed
- Tipo di ritorno
res.users record
- Environment.company¶
Return the current company (as an instance).
If not specified in the context (
allowed_company_ids
), fallback on current user main company.- Solleva
AccessError – invalid or unauthorized
allowed_company_ids
context key content.- Ritorna
current company (default=`self.user.company_id`), with the current environment
- Tipo di ritorno
res.company record
Avvertimento
No sanity checks applied in sudo mode ! When in sudo mode, a user can access any company, even if not in his allowed companies.
This allows to trigger inter-company modifications, even if the current user doesn’t have access to the targeted company.
- Environment.companies¶
Return a recordset of the enabled companies by the user.
If not specified in the context(
allowed_company_ids
), fallback on current user companies.- Solleva
AccessError – invalid or unauthorized
allowed_company_ids
context key content.- Ritorna
current companies (default=`self.user.company_ids`), with the current environment
- Tipo di ritorno
res.company recordset
Avvertimento
No sanity checks applied in sudo mode ! When in sudo mode, a user can access any company, even if not in his allowed companies.
This allows to trigger inter-company modifications, even if the current user doesn’t have access to the targeted company.
Useful environment methods¶
- Environment.ref(xml_id, raise_if_not_found=True)[sorgente]¶
Return the record corresponding to the given
xml_id
.- Parametri
- Ritorna
Found record or None
- Solleva
ValueError – if record wasn’t found and
raise_if_not_found
is True
- Environment.is_superuser()[sorgente]¶
Return whether the environment is in superuser mode.
- Environment.is_admin()[sorgente]¶
Return whether the current user has group «Access Rights», or is in superuser mode.
- Environment.is_system()[sorgente]¶
Return whether the current user has group «Settings», or is in superuser mode.
Altering the environment¶
- Model.with_context([context][, **overrides]) Model [sorgente]¶
Returns a new version of this recordset attached to an extended context.
The extended context is either the provided
context
in whichoverrides
are merged or the current context in whichoverrides
are merged e.g.:# current context is {'key1': True} r2 = records.with_context({}, key2=True) # -> r2._context is {'key2': True} r2 = records.with_context(key2=True) # -> r2._context is {'key1': True, 'key2': True}
- Model.with_user(user)[sorgente]¶
Return a new version of this recordset attached to the given user, in non-superuser mode, unless
user
is the superuser (by convention, the superuser is always in superuser mode.)
- Model.with_company(company)[sorgente]¶
Return a new version of this recordset with a modified context, such that:
result.env.company = company result.env.companies = self.env.companies | company
- Parametri
company (
res_company
or int) – main company of the new environment.
Avvertimento
When using an unauthorized company for current user, accessing the company(ies) on the environment may trigger an AccessError if not done in a sudoed environment.
- Model.with_env(env)[sorgente]¶
Return a new version of this recordset attached to the provided environment.
- Parametri
env (
Environment
) –
Nota
The returned recordset has the same prefetch object as
self
.
- Model.sudo([flag=True])[sorgente]¶
Returns a new version of this recordset with superuser mode enabled or disabled, depending on
flag
. The superuser mode does not change the current user, and simply bypasses access rights checks.Avvertimento
Using
sudo
could cause data access to cross the boundaries of record rules, possibly mixing records that are meant to be isolated (e.g. records from different companies in multi-company environments).It may lead to un-intuitive results in methods which select one record among many - for example getting the default company, or selecting a Bill of Materials.
Nota
The returned recordset has the same prefetch object as
self
.
SQL Execution¶
The cr
attribute on environments is the
cursor for the current database transaction and allows executing SQL directly,
either for queries which are difficult to express using the ORM (e.g. complex
joins) or for performance reasons:
self.env.cr.execute("some_sql", params)
Avvertimento
Executing raw SQL bypasses the ORM and, by consequent, Odoo security rules. Please make sure your queries are sanitized when using user input and prefer using ORM utilities if you don’t really need to use SQL queries.
One important thing to know about models is that they don’t necessarily perform database updates right away. Indeed, for performance reasons, the framework delays the recomputation of fields after modifying records. And some database updates are delayed, too. Therefore, before querying the database, one has to make sure that it contains the relevant data for the query. This operation is called flushing and performs the expected database updates.
Example
# make sure that 'partner_id' is up-to-date in database
self.env['model'].flush_model(['partner_id'])
self.env.cr.execute("SELECT id FROM model WHERE partner_id IN %s", [ids])
ids = [row[0] for row in self.env.cr.fetchall()]
Before every SQL query, one has to flush the data needed for that query. There are three levels for flushing, each with its own API. One can flush either everything, all the records of a model, or some specific records. Because delaying updates improves performance in general, we recommend to be specific when flushing.
- Environment.flush_all()[sorgente]¶
Flush all pending computations and updates to the database.
- Model.flush_model(fnames=None)[sorgente]¶
Process the pending computations and database updates on
self
’s model. When the parameter is given, the method guarantees that at least the given fields are flushed to the database. More fields can be flushed, though.- Parametri
fnames – optional iterable of field names to flush
- Model.flush_recordset(fnames=None)[sorgente]¶
Process the pending computations and database updates on the records
self
. When the parameter is given, the method guarantees that at least the given fields on recordsself
are flushed to the database. More fields and records can be flushed, though.- Parametri
fnames – optional iterable of field names to flush
Because models use the same cursor and the Environment
holds various caches, these caches must be invalidated when altering the
database in raw SQL, or further uses of models may become incoherent. It is
necessary to clear caches when using CREATE
, UPDATE
or DELETE
in
SQL, but not SELECT
(which simply reads the database).
Example
# make sure 'state' is up-to-date in database
self.env['model'].flush_model(['state'])
self.env.cr.execute("UPDATE model SET state=%s WHERE state=%s", ['new', 'old'])
# invalidate 'state' from the cache
self.env['model'].invalidate_model(['state'])
Just like flushing, one can invalidate either the whole cache, the cache of all the records of a model, or the cache of specific records. One can even invalidate specific fields on some records or all records of a model. As the cache improves performance in general, we recommend to be specific when invalidating.
- Environment.invalidate_all(flush=True)[sorgente]¶
Invalidate the cache of all records.
- Parametri
flush – whether pending updates should be flushed before invalidation. It is
True
by default, which ensures cache consistency. Do not use this parameter unless you know what you are doing.
- Model.invalidate_model(fnames=None, flush=True)[sorgente]¶
Invalidate the cache of all records of
self
’s model, when the cached values no longer correspond to the database values. If the parameter is given, only the given fields are invalidated from cache.- Parametri
fnames – optional iterable of field names to invalidate
flush – whether pending updates should be flushed before invalidation. It is
True
by default, which ensures cache consistency. Do not use this parameter unless you know what you are doing.
- Model.invalidate_recordset(fnames=None, flush=True)[sorgente]¶
Invalidate the cache of the records in
self
, when the cached values no longer correspond to the database values. If the parameter is given, only the given fields onself
are invalidated from cache.- Parametri
fnames – optional iterable of field names to invalidate
flush – whether pending updates should be flushed before invalidation. It is
True
by default, which ensures cache consistency. Do not use this parameter unless you know what you are doing.
The methods above keep the caches and the database consistent with each other. However, if computed field dependencies have been modified in the database, one has to inform the models for the computed fields to be recomputed. The only thing the framework needs to know is what fields have changed on which records.
Example
# make sure 'state' is up-to-date in database
self.env['model'].flush_model(['state'])
# use the RETURNING clause to retrieve which rows have changed
self.env.cr.execute("UPDATE model SET state=%s WHERE state=%s RETURNING id", ['new', 'old'])
ids = [row[0] for row in self.env.cr.fetchall()]
# invalidate the cache, and notify the update to the framework
records = self.env['model'].browse(ids)
records.invalidate_recordset(['state'])
records.modified(['state'])
One has to figure out which records have been modified. There are many ways to
do this, possibly involving extra SQL queries. In the example above, we take
advantage of the RETURNING
clause of PostgreSQL to retrieve the information
without an extra query. After making the cache consistent by invalidation,
invoke the method modified
on the modified records with the fields that
have been updated.
- Model.modified(fnames, create=False, before=False)[sorgente]¶
Notify that fields will be or have been modified on
self
. This invalidates the cache where necessary, and prepares the recomputation of dependent stored fields.- Parametri
fnames – iterable of field names modified on records
self
create – whether called in the context of record creation
before – whether called before modifying records
self
Common ORM methods¶
Create/update¶
- Model.create(vals_list) records [sorgente]¶
Creates new records for the model.
The new records are initialized using the values from the list of dicts
vals_list
, and if necessary those fromdefault_get()
.- Parametri
vals_list (Union[list[dict], dict]) –
values for the model’s fields, as a list of dictionaries:
[{'field_name': field_value, ...}, ...]
For backward compatibility,
vals_list
may be a dictionary. It is treated as a singleton list[vals]
, and a single record is returned.see
write()
for details- Ritorna
the created records
- Solleva
AccessError – if the current user is not allowed to create records of the specified model
ValidationError – if user tries to enter invalid value for a selection field
ValueError – if a field name specified in the create values does not exist.
UserError – if a loop would be created in a hierarchy of objects a result of the operation (such as setting an object as its own parent)
- Model.copy(default=None)[sorgente]¶
Duplicate record
self
updating it with default values- Parametri
default (dict) – dictionary of field values to override in the original values of the copied record, e.g:
{'field_name': overridden_value, ...}
- Ritorna
new record
- Model.default_get(fields_list) default_values [sorgente]¶
Return default values for the fields in
fields_list
. Default values are determined by the context, user defaults, and the model itself.- Parametri
fields_list (list) – names of field whose default is requested
- Ritorna
a dictionary mapping field names to their corresponding default values, if they have a default value.
- Tipo di ritorno
Nota
Unrequested defaults won’t be considered, there is no need to return a value for fields whose names are not in
fields_list
.
- Model.name_create(name) record [sorgente]¶
Create a new record by calling
create()
with only one value provided: the display name of the new record.The new record will be initialized with any default values applicable to this model, or provided through the context. The usual behavior of
create()
applies.- Parametri
name – display name of the record to create
- Tipo di ritorno
- Ritorna
the
name_get()
pair value of the created record
- Model.write(vals)[sorgente]¶
Updates all records in
self
with the provided values.- Parametri
vals (dict) – fields to update and the value to set on them
- Solleva
AccessError – if user is not allowed to modify the specified records/fields
ValidationError – if invalid values are specified for selection fields
UserError – if a loop would be created in a hierarchy of objects a result of the operation (such as setting an object as its own parent)
For numeric fields (
Integer
,Float
) the value should be of the corresponding typeFor
Selection
, the value should match the selection values (generallystr
, sometimesint
)For
Many2one
, the value should be the database identifier of the record to setThe expected value of a
One2many
orMany2many
relational field is a list ofCommand
that manipulate the relation the implement. There are a total of 7 commands:create()
,update()
,delete()
,unlink()
,link()
,clear()
, andset()
.For
Date
and~odoo.fields.Datetime
, the value should be either a date(time), or a string.Avvertimento
If a string is provided for Date(time) fields, it must be UTC-only and formatted according to
odoo.tools.misc.DEFAULT_SERVER_DATE_FORMAT
andodoo.tools.misc.DEFAULT_SERVER_DATETIME_FORMAT
Other non-relational fields use a string for value
Search/Read¶
- Model.browse([ids]) records [sorgente]¶
Returns a recordset for the ids provided as parameter in the current environment.
self.browse([7, 18, 12]) res.partner(7, 18, 12)
- Model.search(domain[, offset=0][, limit=None][, order=None][, count=False])[sorgente]¶
Searches for records based on the
domain
search domain.- Parametri
domain – A search domain. Use an empty list to match all records.
offset (int) – number of results to ignore (default: none)
limit (int) – maximum number of records to return (default: all)
order (str) – sort string
count (bool) – if True, only counts and returns the number of matching records (default: False)
- Ritorna
at most
limit
records matching the search criteria- Solleva
AccessError – if user is not allowed to access requested information
- Model.search_count(domain) int [sorgente]¶
Returns the number of records in the current model matching the provided domain.
- Parametri
domain – A search domain. Use an empty list to match all records.
limit – maximum number of record to count (upperbound) (default: all)
- Model.name_search(name='', args=None, operator='ilike', limit=100) records [sorgente]¶
Search for records that have a display name matching the given
name
pattern when compared with the givenoperator
, while also matching the optional search domain (args
).This is used for example to provide suggestions based on a partial value for a relational field. Should usually behave as the reverse of
name_get()
, but that is ont guaranteed.This method is equivalent to calling
search()
with a search domain based ondisplay_name
and thenname_get()
on the result of the search.- Parametri
- Tipo di ritorno
- Ritorna
list of pairs
(id, text_repr)
for all matching records.
- Model.read([fields])[sorgente]¶
Reads the requested fields for the records in
self
, low-level/RPC method.- Parametri
- Ritorna
a list of dictionaries mapping field names to their values, with one dictionary per record
- Tipo di ritorno
- Solleva
AccessError – if user is not allowed to access requested information
ValueError – if a requested field does not exist
- Model.read_group(domain, fields, groupby, offset=0, limit=None, orderby=False, lazy=True)[sorgente]¶
Get the list of records in list view grouped by the given
groupby
fields.- Parametri
domain (list) – A search domain. Use an empty list to match all records.
fields (list) – list of fields present in the list view specified on the object. Each element is either “field” (field name, using the default aggregation), or “field:agg” (aggregate field with aggregation function “agg”), or “name:agg(field)” (aggregate field with “agg” and return it as “name”). The possible aggregation functions are the ones provided by PostgreSQL and “count_distinct”, with the expected meaning.
groupby (list) – list of groupby descriptions by which the records will be grouped. A groupby description is either a field (then it will be grouped by that field) or a string “field:granularity”. Right now, the only supported granularities are “day”, “week”, “month”, “quarter” or “year”, and they only make sense for date/datetime fields.
offset (int) – optional number of records to skip
limit (int) – optional max number of records to return
orderby (str) – optional
order by
specification, for overriding the natural sort ordering of the groups, see alsosearch()
(supported only for many2one fields currently)lazy (bool) – if true, the results are only grouped by the first groupby and the remaining groupbys are put in the __context key. If false, all the groupbys are done in one call.
- Ritorna
list of dictionaries(one dictionary for each record) containing:
the values of fields grouped by the fields in
groupby
argument__domain: list of tuples specifying the search criteria
__context: dictionary with argument like
groupby
- __range: (date/datetime only) dictionary with field_name:granularity as keys
mapping to a dictionary with keys: «from» (inclusive) and «to» (exclusive) mapping to a string representation of the temporal bounds of the group
- Tipo di ritorno
[{“field_name_1”: value, …}, …]
- Solleva
AccessError – if user is not allowed to access requested information
Fields¶
- Model.fields_get([allfields][, attributes])[sorgente]¶
Return the definition of each field.
The returned value is a dictionary (indexed by field name) of dictionaries. The _inherits’d fields are included. The string, help, and selection (if present) attributes are translated.
Search domains¶
A domain is a list of criteria, each criterion being a triple (either a
list
or a tuple
) of (field_name, operator, value)
where:
field_name
(str
)a field name of the current model, or a relationship traversal through a
Many2one
using dot-notation e.g.'street'
or'partner_id.country'
operator
(str
)an operator used to compare the
field_name
with thevalue
. Valid operators are:=
equals to
!=
not equals to
>
greater than
>=
greater than or equal to
<
less than
<=
less than or equal to
=?
unset or equals to (returns true if
value
is eitherNone
orFalse
, otherwise behaves like=
)=like
matches
field_name
against thevalue
pattern. An underscore_
in the pattern stands for (matches) any single character; a percent sign%
matches any string of zero or more characters.like
matches
field_name
against the%value%
pattern. Similar to=like
but wrapsvalue
with “%” before matchingnot like
doesn’t match against the
%value%
patternilike
case insensitive
like
not ilike
case insensitive
not like
=ilike
case insensitive
=like
in
is equal to any of the items from
value
,value
should be a list of itemsnot in
is unequal to all of the items from
value
child_of
is a child (descendant) of a
value
record (value can be either one item or a list of items).Takes the semantics of the model into account (i.e following the relationship field named by
_parent_name
).parent_of
is a parent (ascendant) of a
value
record (value can be either one item or a list of items).Takes the semantics of the model into account (i.e following the relationship field named by
_parent_name
).
value
variable type, must be comparable (through
operator
) to the named field.
Domain criteria can be combined using logical operators in prefix form:
'&'
logical AND, default operation to combine criteria following one another. Arity 2 (uses the next 2 criteria or combinations).
'|'
logical OR, arity 2.
'!'
logical NOT, arity 1.
Nota
Mostly to negate combinations of criteria Individual criterion generally have a negative form (e.g.
=
->!=
,<
->>=
) which is simpler than negating the positive.
Example
To search for partners named ABC, from belgium or germany, whose language is not english:
[('name','=','ABC'),
('language.code','!=','en_US'),
'|',('country_id.code','=','be'),
('country_id.code','=','de')]
This domain is interpreted as:
(name is 'ABC')
AND (language is NOT english)
AND (country is Belgium OR Germany)
Unlink¶
- Model.unlink()[sorgente]¶
Deletes the records in
self
.- Solleva
AccessError – if the user is not allowed to delete all the given records
UserError – if the record is default property for other records
Record(set) information¶
- Model.ids¶
Return the list of actual record ids corresponding to
self
.
- odoo.models.env¶
Returns the environment of the given recordset.
- Type
- Model.exists() records [sorgente]¶
Returns the subset of records in
self
that exist. It can be used as a test on records:if record.exists(): ...
By convention, new records are returned as existing.
- Model.ensure_one()[sorgente]¶
Verify that the current recordset holds a single record.
- Solleva
odoo.exceptions.ValueError –
len(self) != 1
- Model.name_get()[sorgente]¶
Returns a textual representation for the records in
self
, with one item output per input record, in the same order.Avvertimento
Although
name_get()
can use context data for richer contextual formatting, as it is the default implementation fordisplay_name
it is important that it resets to the «default» behaviour if the context keys are empty / missing.
- Model.get_metadata()[sorgente]¶
Return some metadata about the given records.
- Ritorna
list of ownership dictionaries for each requested record
- Tipo di ritorno
list of dictionaries with the following keys:
id: object id
create_uid: user who created the record
create_date: date when the record was created
write_uid: last user who changed the record
write_date: date of the last change to the record
xmlid: XML ID to use to refer to this record (if there is one), in format
module.name
xmlids: list of dict with xmlid in format
module.name
, and noupdate as booleannoupdate: A boolean telling if the record will be updated or not
Operations¶
Recordsets are immutable, but sets of the same model can be combined using various set operations, returning new recordsets.
record in set
returns whetherrecord
(which must be a 1-element recordset) is present inset
.record not in set
is the inverse operationset1 <= set2
andset1 < set2
return whetherset1
is a subset ofset2
(resp. strict)set1 >= set2
andset1 > set2
return whetherset1
is a superset ofset2
(resp. strict)set1 | set2
returns the union of the two recordsets, a new recordset containing all records present in either sourceset1 & set2
returns the intersection of two recordsets, a new recordset containing only records present in both sourcesset1 - set2
returns a new recordset containing only records ofset1
which are not inset2
Recordsets are iterable so the usual Python tools are available for
transformation (map()
, sorted()
,
ifilter()
, …) however these return either a
list
or an iterator, removing the ability to
call methods on their result, or to use set operations.
Recordsets therefore provide the following operations returning recordsets themselves (when possible):
Filter¶
- Model.filtered(func)[sorgente]¶
Return the records in
self
satisfyingfunc
.- Parametri
func (callable or str) – a function or a dot-separated sequence of field names
- Ritorna
recordset of records satisfying func, may be empty.
# only keep records whose company is the current user's records.filtered(lambda r: r.company_id == user.company_id) # only keep records whose partner is a company records.filtered("partner_id.is_company")
- Model.filtered_domain(domain)[sorgente]¶
Return the records in
self
satisfying the domain and keeping the same order.- Parametri
domain – A search domain.
Map¶
- Model.mapped(func)[sorgente]¶
Apply
func
on all records inself
, and return the result as a list or a recordset (iffunc
return recordsets). In the latter case, the order of the returned recordset is arbitrary.- Parametri
func (callable or str) – a function or a dot-separated sequence of field names
- Ritorna
self if func is falsy, result of func applied to all
self
records.- Tipo di ritorno
list or recordset
# returns a list of summing two fields for each record in the set records.mapped(lambda r: r.field1 + r.field2)
The provided function can be a string to get field values:
# returns a list of names records.mapped('name') # returns a recordset of partners records.mapped('partner_id') # returns the union of all partner banks, with duplicates removed records.mapped('partner_id.bank_ids')
Nota
Since V13, multi-relational field access is supported and works like a mapped call:
records.partner_id # == records.mapped('partner_id')
records.partner_id.bank_ids # == records.mapped('partner_id.bank_ids')
records.partner_id.mapped('name') # == records.mapped('partner_id.name')
Sort¶
- Model.sorted(key=None, reverse=False)[sorgente]¶
Return the recordset
self
ordered bykey
.- Parametri
# sort records by name records.sorted(key=lambda r: r.name)
Inheritance and extension¶
Odoo provides three different mechanisms to extend models in a modular way:
creating a new model from an existing one, adding new information to the copy but leaving the original module as-is
extending models defined in other modules in-place, replacing the previous version
delegating some of the model’s fields to records it contains
Classical inheritance¶
When using the _inherit
and
_name
attributes together, Odoo creates a new
model using the existing one (provided via
_inherit
) as a base. The new model gets all the
fields, methods and meta-information (defaults & al) from its base.
class Inheritance0(models.Model):
_name = 'inheritance.0'
_description = 'Inheritance Zero'
name = fields.Char()
def call(self):
return self.check("model 0")
def check(self, s):
return "This is {} record {}".format(s, self.name)
class Inheritance1(models.Model):
_name = 'inheritance.1'
_inherit = 'inheritance.0'
_description = 'Inheritance One'
def call(self):
return self.check("model 1")
and using them:
a = env['inheritance.0'].create({'name': 'A'})
b = env['inheritance.1'].create({'name': 'B'})
a.call()
b.call()
will yield:
«This is model 0 record A» «This is model 1 record B»
the second model has inherited from the first model’s check
method and its
name
field, but overridden the call
method, as when using standard
Python inheritance.
Extension¶
When using _inherit
but leaving out
_name
, the new model replaces the existing one,
essentially extending it in-place. This is useful to add new fields or methods
to existing models (created in other modules), or to customize or reconfigure
them (e.g. to change their default sort order):
class Extension0(models.Model):
_name = 'extension.0'
_description = 'Extension zero'
name = fields.Char(default="A")
class Extension1(models.Model):
_inherit = 'extension.0'
description = fields.Char(default="Extended")
record = env['extension.0'].create({})
record.read()[0]
will yield:
{'name': "A", 'description': "Extended"}
Nota
It will also yield the various automatic fields unless they’ve been disabled
Delegation¶
The third inheritance mechanism provides more flexibility (it can be altered
at runtime) but less power: using the _inherits
a model delegates the lookup of any field not found on the current model
to «children» models. The delegation is performed via
Reference
fields automatically set up on the parent
model.
The main difference is in the meaning. When using Delegation, the model has one instead of is one, turning the relationship in a composition instead of inheritance:
class Screen(models.Model):
_name = 'delegation.screen'
_description = 'Screen'
size = fields.Float(string='Screen Size in inches')
class Keyboard(models.Model):
_name = 'delegation.keyboard'
_description = 'Keyboard'
layout = fields.Char(string='Layout')
class Laptop(models.Model):
_name = 'delegation.laptop'
_description = 'Laptop'
_inherits = {
'delegation.screen': 'screen_id',
'delegation.keyboard': 'keyboard_id',
}
name = fields.Char(string='Name')
maker = fields.Char(string='Maker')
# a Laptop has a screen
screen_id = fields.Many2one('delegation.screen', required=True, ondelete="cascade")
# a Laptop has a keyboard
keyboard_id = fields.Many2one('delegation.keyboard', required=True, ondelete="cascade")
record = env['delegation.laptop'].create({
'screen_id': env['delegation.screen'].create({'size': 13.0}).id,
'keyboard_id': env['delegation.keyboard'].create({'layout': 'QWERTY'}).id,
})
record.size
record.layout
will result in:
13.0
'QWERTY'
and it’s possible to write directly on the delegated field:
record.write({'size': 14.0})
Avvertimento
when using delegation inheritance, methods are not inherited, only fields
Avvertimento
_inherits
is more or less implemented, avoid it if you can;chained
_inherits
is essentially not implemented, we cannot guarantee anything on the final behavior.
Fields Incremental Definition¶
A field is defined as class attribute on a model class. If the model is extended, one can also extend the field definition by redefining a field with the same name and same type on the subclass. In that case, the attributes of the field are taken from the parent class and overridden by the ones given in subclasses.
For instance, the second class below only adds a tooltip on the field
state
:
class First(models.Model):
_name = 'foo'
state = fields.Selection([...], required=True)
class Second(models.Model):
_inherit = 'foo'
state = fields.Selection(help="Blah blah blah")
Error management¶
The Odoo Exceptions module defines a few core exception types.
Those types are understood by the RPC layer. Any other exception type bubbling until the RPC layer will be treated as a “Server error”.
Nota
If you consider introducing new exceptions,
check out the odoo.addons.test_exceptions
module.
- exception odoo.exceptions.UserError(message)[sorgente]¶
Generic error managed by the client.
Typically when the user tries to do something that has no sense given the current state of a record. Semantically comparable to the generic 400 HTTP status codes.
- exception odoo.exceptions.RedirectWarning(message, action, button_text, additional_context=None)[sorgente]¶
Warning with a possibility to redirect the user instead of simply displaying the warning message.
- Parametri
message (str) – exception message and frontend modal content
action_id (int) – id of the action where to perform the redirection
button_text (str) – text to put on the button that will trigger the redirection.
additional_context (dict) – parameter passed to action_id. Can be used to limit a view to active_ids for example.
- exception odoo.exceptions.AccessDenied(message='Access Denied')[sorgente]¶
Login/password error.
Nota
No traceback.
Example
When you try to log with a wrong password.
- exception odoo.exceptions.AccessError(message)[sorgente]¶
Access rights error.
Example
When you try to read a record that you are not allowed to.
- exception odoo.exceptions.CacheMiss(record, field)[sorgente]¶
Missing value(s) in cache.
Example
When you try to read a value in a flushed cache.
- exception odoo.exceptions.MissingError(message)[sorgente]¶
Missing record(s).
Example
When you try to write on a deleted record.
- exception odoo.exceptions.ValidationError(message)[sorgente]¶
Violation of python constraints.
Example
When you try to create a new user with a login which already exist in the db.