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Create e list from records on many2many relational field

filter many2many

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Paulo Matos

Good day everyone,
I am working on a report for Odoo v12.
I have a related many2many field on my model, which collects information from res.users.
When I browse and print records from this field, i get results like:

[[res.users(2,)]]
[[res.users(39,)]]
[[res.users(2,37,)]]
[[res.users(37,39)]]
[[res.users(37,7,2)]]
[[res.users(39,7)]]

From the list above, I can see that I have several duplicated values which is expactable and are correct.
Everytime I try to use the append() method on the loop, all new records are replacing the old ones, but I am sure I am not using it correctly.

My problems:
1. I need to browse through the records and collect all values, creating a new list and remove all duplicates.
2. After that, I will need to browse through the list and compare with the record on the relational field (for instance [[res.users(37,39)]]) and check if any of the list values exists on the relational field.
Doing that, I will be able to process my report, since it is sorted by users on "res.users".

How can I achieve that?

Thank you all once again in advance

Best regards

Paulo

faOtools

Jawaban Terbai

Odoo let you work directly with recordsets (extend, union, intersect, difference), so my suggestion is to avoid browsing over your many2many lists. Let me make a few assumptions to make clear examples:

You have 'records' over you iterate
Each record has 'user_ids' field (res.users, many2many)
You want to compare aggregation of those users to another field (let assume 'mymodel.user_ids', also res.users, many2many).

Then, to aggregate all users over all records into a single recordset you need just:

final_user_ids = records.mapped("user_ids")

It will return res.users(2,7,37,39,) - so, a recordset without duplicates.

Then, you can simply compare this set to your custom field set as:

intersected_user_ids = final_user_ids & mymodel.user_ids

It will return all the elements which are in both recordsets. To check whether it is empty:

if intersected_user_ids:
    print ("The same users", intersected_user_ids)
    # >> res.users(2,7)

So, the goal is achieved in 4 lines.

Paulo Matos

Penulis

Dear @Odoo Tools,

Thank you very much for your help.

Using your approach I have successfully reached my initial goal.

With it, I have browsed to all records and finished my report for all users.

Now for the part: intersected_user_ids = final_user_ids & mymodel.user_ids

I am not comparing to a model recordset.

I am trying to compare with a variable and try to see if "variable_value is in final_user_ids" but I am unable to do it.

So, until now I have (based on you example):

my_recordset : which contains all records to be filtered and shown on report, based on final_user_ids

final_user_ids : which lists all desired users from my recordset with no duplicates;

report data : I have successfully browsed from all desired records on my_recordset and collect data for every record on final_user_ids.

At this stage I am able to print the report for all users, but I am unable to filter the records on final_user_ids based on a variable in order to collect the data just for that particular user.

PS: I will mark your answer as correct because it is correct and working as expected.

Thank you once again

Best regards

Paulo

faOtools

In order to check whether a specific user is inside a recordset you can check "if user_id in final_user_ids". If user_id is an ID - integer (not record) then "if user_id in final_user_ids.ids". If you rely upon a current user (who prints): "if self.env.user in final_user_ids"

Paulo Matos

Penulis

@Odoo Tools,

Thank you very much once again.

The problem was on "if user_id in final_user_ids.ids". I was using "final_user_ids.ID" instead of "final_user_ids.IDS"

Best regards

Paulo

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