The issue occurs when a computed field depends on a many2many field with
a corresponding inverse field on its comodel. Consider two models like
class User(models.Model):
_name = _description = 'test_new_api.user'
group_ids = fields.Many2many('test_new_api.group')
group_count = fields.Integer(compute='_compute_group_count', store=True)
@api.depends('group_ids')
def _compute_group_count(self):
for user in self:
user.group_count = len(user.group_ids)
class Group(models.Model):
_name = _description = 'test_new_api.group'
user_ids = fields.Many2many('test_new_api.user')
When a user is added to a group with
group.write({'user_ids': [Command.link(user.id)]})
we expect the field `group_count` to be recomputed on `user` only, but
it is actually triggered on *all* the records in `group.user_ids`. This
is a real performance issue when there are many records in the relation.
The explanation comes from the fact that
- the framework considers the field `user_ids` is modified on `group`;
- the field `group_count` implicitly depends on `group_ids.user_ids`,
which makes it triggered on the users `u` such that `u.group_ids`
intersects `group`.
The solution consists in handling the dependencies on inverse many2many
field in the field itself. The field no longer adds the implicit
dependency on its inverse field in the trigger tree, but instead
determines which records in the comodel are actually impacted by the
relation change in the method field.write().
closesodoo/odoo#111943
X-original-commit: bb3a6e378b5f6b2e14b74ce4efb6d749ad54cb1e
Signed-off-by: Raphael Collet <rco@odoo.com>
Raphael Collet
ed762a3cef