[FIX] product_attribute_set: auto update attributes by updating attribute_set_id

Adding some test cases to confirm that the attributes will only be visible
if the attribute set id has a value.

Author: kobros-tech

product_attribute_set/demo/product_attribute.xml

@@ -65,13 +65,11 @@
         <field name="field_id" eval="ref('product.field_product_template__weight')" />
         <field name="attribute_group_id" ref="computer_transport_attribute_group" />
         <field name="attribute_set_ids" eval="[(4, ref('computer_attribute_set'))]" />
-        <field name="model_id" ref="product.model_product_template" />
     </record>
     <record id="computer_volume_attribute" model="attribute.attribute">
         <field name="nature">native</field>
         <field name="field_id" eval="ref('product.field_product_template__volume')" />
         <field name="attribute_group_id" ref="computer_transport_attribute_group" />
         <field name="attribute_set_ids" eval="[(4, ref('computer_attribute_set'))]" />
-        <field name="model_id" ref="product.model_product_template" />
     </record>
 </odoo>

product_attribute_set/models/product.py

@@ -47,6 +47,14 @@ def _onchange_categ_id(self):
         if self.categ_id and not self.attribute_set_id:
             self.attribute_set_id = self.categ_id.attribute_set_id
 
+    @api.onchange("attribute_set_id")
+    def _onchange_attribute_set_id(self):
+        """Trigger _get_view_fields implicitly to auto update attributes in the UI"""
+        if self.attribute_set_id:
+            view_id = self.env.ref("product.product_template_only_form_view").id
+            view = self.get_views([(view_id, "form")], {})
+            view.get("models")
+
 
 class ProductProduct(models.Model):
 

product_attribute_set/tests/__init__.py

@@ -0,0 +1 @@
+from . import test_product

product_attribute_set/tests/test_product.py

@@ -0,0 +1,52 @@
+# Copyright 2025 Kencove (http://kencove.com).
+# @author Mohamed Alkobrosli <[email protected]>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+import lxml.etree as ET
+
+from odoo.tests.common import Form, TransactionCase
+
+
+class TestProductAttributeSet(TransactionCase):
+    def setUp(self):
+        self.ProductTemplate = self.env["product.template"]
+        self.view_id = self.env.ref("product.product_template_only_form_view").id
+        self.computer = self.env.ref("product_attribute_set.computer_attribute_set")
+        self.x_technical_description = self.env.ref(
+            "product_attribute_set.computer_tech_description_attribute"
+        )
+        super().setUp()
+
+    def test_onchange_attribute_set_id(self):
+        """Test that onchange on attribute_set_id is triggered and view fields are updated"""
+
+        product = None
+
+        with self.assertRaises(AssertionError):
+            # AssertionError: can't write on invisible field x_technical_description
+            with Form(self.ProductTemplate) as f:
+                f.name = "Test Product"
+                f.x_technical_description = "high quality product"
+                f.save()
+        with Form(self.ProductTemplate) as f:
+            f.name = "Test Product"
+            f.attribute_set_id = self.computer
+            f.x_technical_description = "high quality product"
+            product = f.save()
+        # Asserting the field is only writeable when it is visible
+        self.assertEqual(
+            product.x_technical_description,
+            "high quality product",
+        )
+
+        views = product.get_views([(self.view_id, "form")], {})
+        arch = views["views"]["form"]["arch"]
+        xml_arch = ET.fromstring(arch)
+        field_node = xml_arch.xpath("//field[@name='x_technical_description']")
+        self.assertTrue(field_node)
+        field_node = field_node[0]
+        attrs = field_node.get("attrs")
+        # This domain as it is rendered with attributes,
+        # it will make them visible only if the attribute set id equals 1
+        self.assertEqual(attrs, "{'invisible': [('attribute_set_id', 'not in', [1])]}")
+        self.assertEqual(self.computer.id, 1)