[19.0][ADD] product_class: classes to group product attributes

[Ricardoalso]

This module introduces Product Classes to group product attributes and standardize product setup.

[ivantodorovich]

This domain doesn't seem to be working. See video below:

Screen.Recording.2026-04-23.at.8.41.03.AM.mov

The constraint catches the issue and prevents saving the record, but the UI still allows to select wrong attributes.

AFAIR you can't have expressions like this in the domain attribute, so that may be why it's not working.

The way to work around this typical case is to have an intermediate allowed_attribute_ids non-stored computed field. At least in previous versions, maybe in 19.0 there's a better way that I'm not aware of

[Ricardoalso]

Hm, tricky situation here 🤔

The domain doesn’t work even with the allowed_attribute_ids approach, and the only thing preventing the user from setting an incorrect attribute is the _check_class_attributes constraint. I could override the web_name_search method, but that feels like overkill and adds complexity for limited UX benefit.

I’m open to suggestions

Thanks 🙏

[Ricardoalso]

@ivantodorovich handled it with the approach we discussed about ce5ea6a

Thanks again 🚀

EDIT (context):

Using parent.class_id.attribute_ids directly does not work and triggers :

Invalid composed field class_id.attribute_ids in domain of <field name="attribute_id"> ([('id', 'in', parent.class_id.attribute_ids)] if parent.class_id else [])

Relating to the comment :

AFAIR you can't have expressions like this in the domain attribute, so that may be why it's not working.

normalize_domain handles it

>>> from odoo.fields import Command, Domain
>>> normalize_domain([('id', 'in', [1,2])] if True else [])
[('id', 'in', [1, 2])]
>>> normalize_domain([('id', 'in', [1,2])] if False else [])
[(1, '=', 1)]

[ivantodorovich]

LG.

Small comments, pre-approving