Product Category - Usage Group

This module adds an extra field called Usage Group on product categories. You can pick any existing user group there.

• On the product category form, a new "Access Rights" section shows the Usage Group field.
• The category list and the category search view also show the Usage Group, and you can group categories by Usage Group in the search filters.

When a product is saved with a category that has a Usage Group, Odoo checks whether the current user belongs to that group. If not, the save is blocked with an error message naming both the category and the group.

This applies to product templates (product.template) whenever their category (categ_id) is set, so it affects creating and updating products. The check is a constraint, meaning it runs automatically on save; there is no button to press.

The module only touches product categories and product templates. It does not change sales, purchases, stock or accounting documents. A demo category is included that links a category to the multi-company group, useful for testing.