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odooOdoo13.0
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Imed Chaabouni

I have an onchange function to update two fields on2many, when the function is executed odoo is deleting the records that related to them from database, here is my code:

@api.onchange('ticket_type_id')
def set_ticket_type_id(self):
if self.ticket_type_id and self.ticket_type_id.product_ids:
    self.write({'product_ids':[(6, 0, self.ticket_type_id.product_ids.ids)]})
if self.ticket_type_id and self.ticket_type_id.keywords_ids:
    self.keyword_ids = self.ticket_type_id.keywords_ids



and here is the messages from the log :
            odoo.models.unlink: User #2 deleted product.template records with IDs: [43] 

            odoo.models.unlink: User #2 deleted helpdesk.keywords records with IDs: [3]

Am I missing something !! 

Note: Odoo13

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Imed Chaabouni
Author Best Answer

Hilar AK, i just want to replacing the existing records, I followed what Odoo is doing in the final stage, it is executing the (2, id..) which is deleting from database, I don't know why.

(Can't comment on your reponse...)

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Hilar Andikkadavath

In your code you are using flag 6. which will do 5, _, _ unlink from existing one, 4, _, ids append new one

Imed Chaabouni
Author
Hello Hilarak,

 Thank you for your respond as I couldn't respond you in forum (it's been deleted in my profil)

The flag 6 will do 5 then Unlink with 4 that's right, when debugging, it is executing the 2 also which mean unlink and delete the record,
I don't know why yet, but I resolve the issue by changing the One2many to Many2many, and it's working fine (with the 6 flag)

I just want you to know, thanks again.

De : Hilar AK <hilarak@gmail.com>
Envoyé : mardi 16 juin 2020 12:57
À : Imed <imed08@hotmail.fr>
Objet : Re: Odoo is deleting my records !!
 

In your code you are using flag 6. which will do 5, _, _ unlink from existing one, 4, _, ids append new one


Sent by Odoo S.A. using Odoo.

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Hilar Andikkadavath
Best Answer

The used flag in your answer will replace all existing records.

``(0, _, values)``
    adds a new record created from the provided ``value`` dict.
``(1, id, values)``
    updates an existing record of id ``id`` with the values in
    ``values``. Can not be used in :meth:`~.create`.
``(2, id, _)``
    removes the record of id ``id`` from the set, then deletes it
    (from the database). Can not be used in :meth:`~.create`.
``(3, id, _)``
    removes the record of id ``id`` from the set, but does not
    delete it. Can not be used in
    :meth:`~.create`.
``(4, id, _)``
    adds an existing record of id ``id`` to the set.
``(5, _, _)``
    removes all records from the set, equivalent to using the
    command ``3`` on every record explicitly. Can not be used in
    :meth:`~.create`.
``(6, _, ids)``
    replaces all existing records in the set by the ``ids`` list,
    equivalent to using the command ``5`` followed by a command
    ``4`` for each ``id`` in ``ids``.

If you need to append, then use flag with 4

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