[Odoo 10] .write() stop working and rise error value = self._recs.env.cache[field][]


After almost a year I decided to update my Python code inside Odoo 10. I've a custom module writing on a different model:

from odoo import api, fields, models
import openerp.addons.decimal_precision as dp
import logging

_logger = logging.getLogger(__name__)

class AccountDivina(models.Model):
_inherit = ['']

taxes = fields.Float(
'Taxes', compute='_compute_taxes', store=True, digits=(5, 2), default='0.00')

def _compute_taxes(self):

ptx = self.env['pos.config'].search([('id', '=', 1)])
acj = self.env['account.journal']

if ==[('code', '=', 'CR01')]).id:
self.taxes = ((self.amount / 100) * ptx.cr_tax)
elif ==[('code', '=', 'DB01')]).id:
self.taxes = ((self.amount / 100) * ptx.db_tax)

pos_tax = self.env['pos.order'].search([('id', '=',])
new_val = pos_tax.taxes + self.taxes
print pos_tax, pos_tax.taxes, new_val, pos_tax.margin
pos_tax.write({'taxes': new_val})

I can search and browse with no issues other models, but suddenly the write function stop working, and I don't remember if and when I change the code. 
The log: 

2019-01-23 10:34:09,005 11925 ERROR divina_test6 odoo.http: Exception during JSON request handling.
Traceback (most recent call last):
  File "/opt/odoo/odoo/", line 641, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/odoo/", line 683, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/odoo/", line 333, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/odoo/service/", line 101, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/odoo/", line 326, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo/odoo/", line 941, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/odoo/", line 506, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/addons/web/controllers/", line 892, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/opt/odoo/addons/web/controllers/", line 884, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo/odoo/", line 687, in call_kw
    return call_kw_model(method, model, args, kwargs)
  File "/opt/odoo/odoo/", line 672, in call_kw_model
    result = method(recs, *args, **kwargs)
  File "/opt/odoo/addons/point_of_sale/models/", line 609, in create_from_ui
    pos_order = self._process_order(order)
  File "/opt/odoo/addons/point_of_sale/models/", line 115, in _process_order
  File "/opt/odoo/addons/point_of_sale/models/", line 818, in add_payment
  File "/opt/odoo/addons/account/models/", line 393, in create
    line = super(AccountBankStatementLine, self).create(vals)
  File "/opt/odoo/odoo/", line 3847, in create
    record = self.browse(self._create(old_vals))
  File "/opt/odoo/odoo/", line 4006, in _create
  File "/opt/odoo/odoo/", line 5336, in recompute
    vals = rec._convert_to_write({n: rec[n] for n in ns})
  File "/opt/odoo/odoo/", line 5336, in <dictcomp>
    vals = rec._convert_to_write({n: rec[n] for n in ns})
  File "/opt/odoo/odoo/", line 5232, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/opt/odoo/odoo/", line 918, in __get__
    value = record._cache[self]
  File "/opt/odoo/odoo/", line 5583, in __getitem__
    value = self._recs.env.cache[field][]

Using some print statement in my code I can clearly see the fields/values I need are present, simply I can't update them on model.

For now I'm backing using the cursor

new_val = pos_tax.taxes + self.taxes
new_margin = pos_tax.margin - new_val

sql_wrt_cst = 'UPDATE pos_order SET (taxes, margin) = (%s, %s) WHERE id = %s', [new_val, new_margin,])

But I would like to migrate to the new method.

 Any clue for me?


2 回答
Ibrahim Boudmir
Best Answer
Hi, please try this:

def _compute_taxes(self):
ptx = self.env['pos.config'].search([('id', '=', 1)]) // should not be static
acj = self.env['account.journal']
for record in self:
if ==[('code', '=', 'CR01')]).id:
record.taxes = ((record.amount / 100) * ptx.cr_tax)
elif ==[('code', '=', 'DB01')]).id:
record.taxes = ((record.amount / 100) * ptx.db_tax)
def _write(self, vals):
res = super(AccountDivina, self)._write(vals)
for record in self:
record.set_pos_taxes(vals, record)
return res

def set_pos_taxes(self, vals, record): if vals.get('journal_id'): pos_tax = self.env['pos.order'].browse( new_val = pos_tax.taxes + record.taxes pos_tax.write({'taxes': new_val})

--- UPDATE ---
In order to understand well, you need to check how compute functions are written and what for. Yenthe's answer to this post may be helpful :
don't change other values than those related to your compute function.
That's why i have divided your function into two :
1- Your compputed field is the only field that will be calculated in your compute function.
2- the orther part of code will be placed in _write function: Now in this function, the new value of the compute
field will be taken into consideration, and not the old value. The new one that you need to update your taxes
from pos_order model.
set_pos_taxes() is just for code quality. 

I hope this may be helpful to understand my solution.
3 コメント

Although your reply is virtually perfect for my specific issue, I would like to see a little comment by you on how do you end up with this solution. Not just for me, but for the sake of knowledge. Thanks.

Ibrahim Boudmir

You can read the UPDATE part where i explained the solution.


Yes, much clear now.

Again, I tough could be useful have a little description to let other people trapped in this issue to understand the logic.

Thanks again.

Best Answer
Hi Ibrahim Boudmir .

I have a similar issue :

value = self._recs.env.cache[field][] KeyError: <odoo.models.NewId object at 0x7fbd7de98dd0>

I created a custom module and a new class 'pickingprocess' 

I have a compute method which is active when i change something on my input input_action (it works).

class PickingProcess(models.Model):
     _inherit = "mail.thread"
    _name = 'picking.process'

    input_action = fields.Char("Action")
    input_action2 = fields.Char("Action2"store=Truecompute="_inputact")

    def _inputact(self):
        for record in self:
             if record.input_action == False or record.input_action =="":
#record.input_action2 = record.input_action doesn t work , it don t go through the write method why??

    def write(self,vals):
            _logger.error("write !!")
             return super(PickingProcess, self).write(vals)

First thing, i tried to use record.myattribute = 'toto' but it doesn t work . All the time i need to use the write({...}). Do you know why ? 

Then my second issue is the same as Federico Leoni. I have this : 

  value = self._recs.env.cache[field][] KeyError: <odoo.models.NewId object at 0x7fbd7de98dd0>

Of course in my write method after fix this issue , i would like to do external things on others models...  :) 

Thanks by advance