[ADD] product_attribute_custom_value_variant

product_attribute_custom_value_variant/README.rst

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+========================================
+Create product variant from custom value
+========================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
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+
+.. |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/licence-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/16.0/product_attribute_custom_value_variant
+    :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-16-0/product-attribute-16-0-product_attribute_custom_value_variant
+    :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=16.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Create variants when configured custom attributes are used.
+
+The created variants are useful to retrieve the stock quantity or for purchase.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Configuration
+=============
+
+In any custom attribute value, enable `Create custom variant`.
+
+Usage
+=====
+
+When a product template is added to a sale order line, the configured custom values become real attribute values.
+Here is an example:
+
+1. Create an attribute "Length (cm)"
+#. Add some values to the attribute:
+   - 5
+   - 10
+   - Custom
+#. For the "Custom" value, enable `custom` and `Create custom variant` (added by this module)
+#. Create a product template "Glass" having the created attribute and all its values
+#. Create a sale order that includes the product template
+#. Set the value 42 for the attribute "Length (cm)"
+
+With the above steps, this module creates:
+
+- | A new attribute value "42" for the attribute "Length (cm)"
+  | This attribute value is not linked to the product template, so it does not appear as a choice when the template is sold.
+- A variant for the template, linked to the created attribute value
+
+The created variant can then be used to retrieve its stock quantity or to purchase that exact product variant that had been sold.
+
+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_attribute_custom_value_variant%0Aversion:%2016.0%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
+~~~~~~~
+
+* Aion Tech
+
+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.
+
+This module is part of the `OCA/product-attribute <https://github.com/OCA/product-attribute/tree/16.0/product_attribute_custom_value_variant>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

product_attribute_custom_value_variant/__init__.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import models

product_attribute_custom_value_variant/__manifest__.py

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+# Copyright 2025 Simone Rubino - Aion Tech
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Create product variant from custom value",
+    "summary": "When a custom value is assigned, create a variant instead.",
+    "version": "16.0.1.0.0",
+    "website": "https://github.com/OCA/product-attribute",
+    "author": "Aion Tech, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "category": "Sales/Sales",
+    "depends": [
+        "product",
+        "sale",
+    ],
+    "data": [
+        "views/product_attribute_value_views.xml",
+    ],
+}

product_attribute_custom_value_variant/models/__init__.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import product_attribute_value
+from . import product_attribute
+from . import product_product
+from . import sale_order_line

product_attribute_custom_value_variant/models/product_attribute.py

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+# Copyright 2025 Simone Rubino - Aion Tech
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class ProductAttribute(models.Model):
+    _inherit = "product.attribute"
+
+    def _prepare_variant_custom_attribute_value(self, custom_value):
+        self.ensure_one()
+        return {
+            "attribute_id": self.id,
+            "name": custom_value,
+        }
+
+    def _get_variant_custom_attribute_value(self, custom_value):
+        self.ensure_one()
+        new_attribute_value = self.env["product.attribute.value"].search(
+            [
+                (
+                    "attribute_id",
+                    "=",
+                    self.id,
+                ),
+                ("name", "=", custom_value),
+            ],
+            limit=1,
+        )
+        if not new_attribute_value:
+            new_attribute_value = self.env["product.attribute.value"].create(
+                self._prepare_variant_custom_attribute_value(custom_value)
+            )
+
+        return new_attribute_value

product_attribute_custom_value_variant/models/product_attribute_value.py

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+# Copyright 2025 Simone Rubino - Aion Tech
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import _, api, fields, models
+from odoo.exceptions import ValidationError
+
+
+class ProductAttributeValue(models.Model):
+    _inherit = "product.attribute.value"
+
+    create_custom_variant = fields.Boolean(
+        string="Create custom variant",
+        help="When this custom attribute is used, \
+        a new value and variant will be generated.",
+    )
+
+    @api.constrains(
+        "create_custom_variant",
+        "is_custom",
+    )
+    def _constrain_create_custom_variant(self):
+        for value in self:
+            if value.create_custom_variant and not value.is_custom:
+                raise ValidationError(
+                    _("'Create custom variant' can only be set on custom values")
+                )

product_attribute_custom_value_variant/models/product_product.py

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+# Copyright 2025 Simone Rubino - Aion Tech
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class ProductProduct(models.Model):
+    _inherit = "product.product"
+
+    def _unlink_or_archive(self, check_access=True):
+        custom_variants_to_keep_ids = self.env.context.get("no_remove_custom_variants")
+        return super(
+            ProductProduct, self - self.browse(custom_variants_to_keep_ids)
+        )._unlink_or_archive(check_access=check_access)

product_attribute_custom_value_variant/models/sale_order_line.py

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+# Copyright 2025 Simone Rubino - Aion Tech
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    def _assign_new_custom_variant(self):
+        """Create new variants and assign them to the `self`."""
+        custom_values_to_unlink = self.env["product.attribute.custom.value"].browse()
+        for line in self:
+
+            # Create new attribute values for each "Create custom variant" custom value
+            new_attribute_values = self.env["product.attribute.value"].browse()
+            for custom_attribute_value in line.product_custom_attribute_value_ids:
+                template_attribute_value = (
+                    custom_attribute_value.custom_product_template_attribute_value_id
+                )
+                attribute_value = template_attribute_value.product_attribute_value_id
+                if attribute_value.create_custom_variant:
+                    attribute = template_attribute_value.attribute_id
+                    new_attribute_value = attribute._get_variant_custom_attribute_value(
+                        custom_attribute_value.custom_value,
+                    )
+                    new_attribute_values |= new_attribute_value
+                    template_attribute_value.attribute_line_id.value_ids |= (
+                        new_attribute_value
+                    )
+
+                    custom_values_to_unlink |= custom_attribute_value
+
+            # If new attribute values have been created,
+            # use them to create a new variant and set it in the line
+            attribute_lines = line.product_template_id.attribute_line_ids
+            custom_combination = attribute_lines.product_template_value_ids.filtered(
+                lambda ptav: ptav.product_attribute_value_id in new_attribute_values
+            )
+            if custom_combination:
+                variant_combination = (
+                    line.product_id.product_template_attribute_value_ids
+                )
+                new_variant_combination = (
+                    variant_combination.filtered(
+                        lambda ptav: not ptav.product_attribute_value_id.create_custom_variant
+                    )
+                    | custom_combination
+                )
+                new_variant = line.product_template_id._create_product_variant(
+                    new_variant_combination
+                )
+                line.product_id = new_variant
+                # The new attribute values must not be available for new models
+                for attribute_line in attribute_lines:
+                    attribute_line.with_context(
+                        no_remove_custom_variants=new_variant.ids,
+                    ).value_ids -= (
+                        attribute_line.value_ids & new_attribute_values
+                    )
+
+        if custom_values_to_unlink:
+            custom_values_to_unlink.unlink()
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        lines = super().create(vals_list)
+        custom_value_lines = lines.filtered("product_custom_attribute_value_ids")
+        if custom_value_lines:
+            custom_value_lines._assign_new_custom_variant()
+        return lines

product_attribute_custom_value_variant/readme/CONFIGURE.rst

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+In any custom attribute value, enable `Create custom variant`.

product_attribute_custom_value_variant/readme/DESCRIPTION.rst

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+Create variants when configured custom attributes are used.
+
+The created variants are useful to retrieve the stock quantity or for purchase.

product_attribute_custom_value_variant/readme/USAGE.rst

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+When a product template is added to a sale order line, the configured custom values become real attribute values.
+Here is an example:
+
+1. Create an attribute "Length (cm)"
+#. Add some values to the attribute:
+   - 5
+   - 10
+   - Custom
+#. For the "Custom" value, enable `custom` and `Create custom variant` (added by this module)
+#. Create a product template "Glass" having the created attribute and all its values
+#. Create a sale order that includes the product template
+#. Set the value 42 for the attribute "Length (cm)"
+
+With the above steps, this module creates:
+
+- | A new attribute value "42" for the attribute "Length (cm)"
+  | This attribute value is not linked to the product template, so it does not appear as a choice when the template is sold.
+- A variant for the template, linked to the created attribute value
+
+The created variant can then be used to retrieve its stock quantity or to purchase that exact product variant that had been sold.