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

product_class/README.rst

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+.. image:: https://odoo-community.org/readme-banner-image
+   :target: https://odoo-community.org/get-involved?utm_source=readme
+   :alt: Odoo Community Association
+
+=============
+Product Class
+=============
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:8dfa7798b73efea62709ac4d1d0249c5513baad66528c6adb67521cee96e68e7
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/license-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fproduct--attribute-lightgray.png?logo=github
+    :target: https://github.com/OCA/product-attribute/tree/19.0/product_class
+    :alt: OCA/product-attribute
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/product-attribute-19-0/product-attribute-19-0-product_class
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/product-attribute&target_branch=19.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module introduces Product Classes to group product attributes and
+standardize product setup.
+
+Each product class defines the attributes that are allowed for products
+assigned to that class. On products, a class can be selected, and Odoo
+enforces that attribute lines only use attributes from the selected
+class.
+
+The module also provides menu entries and views to manage product
+classes.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/product-attribute/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/product-attribute/issues/new?body=module:%20product_class%0Aversion:%2019.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* Camptocamp
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+.. |maintainer-Ricardoalso| image:: https://github.com/Ricardoalso.png?size=40px
+    :target: https://github.com/Ricardoalso
+    :alt: Ricardoalso
+.. |maintainer-ivantodorovich| image:: https://github.com/ivantodorovich.png?size=40px
+    :target: https://github.com/ivantodorovich
+    :alt: ivantodorovich
+
+Current `maintainers <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-Ricardoalso| |maintainer-ivantodorovich| 
+
+This module is part of the `OCA/product-attribute <https://github.com/OCA/product-attribute/tree/19.0/product_class>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

product_class/__init__.py

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+from . import models

product_class/__manifest__.py

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+{
+    "name": "Product Class",
+    "version": "19.0.1.0.0",
+    "summary": "Product classification and attribute constraints",
+    "author": "Camptocamp, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/product-attribute",
+    "license": "AGPL-3",
+    "category": "Product",
+    "depends": ["product", "stock", "sale"],
+    "data": [
+        "security/ir.model.access.csv",
+        "views/product_class_views.xml",
+        "views/product_attribute_views.xml",
+        "views/product_template_views.xml",
+    ],
+    "installable": True,
+    "maintainers": ["Ricardoalso", "ivantodorovich"],
+}

product_class/models/__init__.py

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+from . import product_attribute
+from . import product_class
+from . import product_template

product_class/models/product_attribute.py

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+from odoo import api, fields, models
+
+
+class ProductAttribute(models.Model):
+    _inherit = "product.attribute"
+
+    classes_count = fields.Integer(
+        string="Product Classes Count",
+        compute="_compute_classes_count",
+    )
+
+    class_ids = fields.Many2many(
+        comodel_name="product.class",
+        relation="product_class_attribute_rel",
+        column1="attribute_id",
+        column2="product_class_id",
+        string="Product Classes",
+        help="Product classes that include this attribute",
+    )
+
+    @api.depends("class_ids")
+    def _compute_classes_count(self):
+        for attribute in self:
+            attribute.classes_count = len(attribute.class_ids)
+
+    def action_open_product_classes(self):
+        self.ensure_one()
+        action = self.env["ir.actions.actions"]._for_xml_id(
+            "product_class.product_class_action"
+        )
+        action["domain"] = [("id", "in", self.class_ids.ids)]
+        return action

product_class/models/product_class.py

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+from odoo import api, fields, models
+from odoo.exceptions import ValidationError
+
+
+class ProductClass(models.Model):
+    _name = "product.class"
+    _description = "Product Class"
+    _order = "name"
+
+    _name_uniq = models.Constraint(
+        "unique(name)",
+        "A product class with this name already exists.",
+    )
+
+    name = fields.Char()
+    attribute_ids = fields.Many2many(
+        comodel_name="product.attribute",
+        relation="product_class_attribute_rel",
+        column1="product_class_id",
+        column2="attribute_id",
+        string="Attributes",
+        help="Allowed attributes for products of this class",
+    )
+
+    @api.constrains("attribute_ids")
+    def _check_attribute_ids_used_by_products(self):
+        for product_class in self:
+            invalid_lines = self.env["product.template.attribute.line"].search(
+                [
+                    ("product_tmpl_id.class_id", "=", product_class.id),
+                    ("attribute_id", "not in", product_class.attribute_ids.ids),
+                ]
+            )
+            if not invalid_lines:
+                continue
+
+            invalid_names = ", ".join(
+                sorted(set(invalid_lines.mapped("attribute_id.display_name")))
+            )
+            raise ValidationError(
+                self.env._(
+                    "Cannot remove attributes used in products assigned to class "
+                    "'%(product_class)s': %(attrs)s. Please remove these attributes "
+                    "or change the product class.",
+                    product_class=product_class.name,
+                    attrs=invalid_names,
+                )
+            )

product_class/models/product_template.py

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+from odoo import api, fields, models
+from odoo.exceptions import ValidationError
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    class_id = fields.Many2one(
+        comodel_name="product.class",
+        string="Product Class",
+        help="Product class that constrains which attributes can be used",
+    )
+
+    class_attribute_ids = fields.Many2many(
+        related="class_id.attribute_ids",
+        string="Class Attributes",
+        help="Attributes allowed by the selected product class",
+    )
+
+    @api.constrains("class_id", "attribute_line_ids")
+    def _check_class_attributes(self):
+        """
+        Ensure all attribute_line_ids belong to the selected class.
+        """
+        for product in self:
+            if not product.class_id:
+                continue
+
+            class_attributes = product.class_id.attribute_ids
+            invalid_attributes = (
+                product.attribute_line_ids.attribute_id - class_attributes
+            )
+
+            if invalid_attributes:
+                invalid_names = ", ".join(invalid_attributes.mapped("display_name"))
+                raise ValidationError(
+                    self.env._(
+                        "Product '%(product)s' has attribute lines that do not belong "
+                        "to the selected class '%(product_class)s': %(attrs)s. "
+                        "Please remove these attributes or change the product class.",
+                        product=product.name,
+                        product_class=product.class_id.name,
+                        attrs=invalid_names,
+                    )
+                )

product_class/pyproject.toml

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+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"

product_class/readme/DESCRIPTION.md

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+This module introduces Product Classes to group product attributes and standardize product setup.
+
+Each product class defines the attributes that are allowed for products assigned to that class. On products, a class can be selected, and Odoo enforces that attribute lines only use attributes from the selected class.
+
+The module also provides menu entries and views to manage product classes.

product_class/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_create,perm_read,perm_write,perm_unlink
+access_product_class_user,product.class User,model_product_class,base.group_user,1,1,1,0
+access_product_class_manager,product.class Manager,model_product_class,base.group_system,1,1,1,1