[FIX] product: set barcode on archived product

It is currently not possible to write the barcode of an archived
product template. The inverse method does not consider case where
the variant of the template is archived

OPW-3109967

closes odoo/odoo#110697

X-original-commit: 968d0dff823f8e5d0871feaf8b09233fbb91b4de
Signed-off-by: Adrien Widart <awt@odoo.com>

addons/product/models/product_template.py

@@ -212,8 +212,13 @@ class ProductTemplate(models.Model):
             (field name must be identical between product.product & product.template models)
         """
         for template in self:
-            if len(template.product_variant_ids) == 1:
+            count = len(template.product_variant_ids)
+            if count == 1:
                 template.product_variant_ids[fname] = template[fname]
+            elif count == 0:
+                archived_variants = self.with_context(active_test=False).product_variant_ids
+                if len(archived_variants) == 1:
+                    archived_variants[fname] = template[fname]
 
     @api.depends_context('company')
     @api.depends('product_variant_ids.standard_price')

addons/product/tests/test_variants.py

@@ -1186,6 +1186,19 @@ class TestVariantsArchive(ProductVariantsCommon):
 
         Product._revert_method('unlink')
 
+    def test_set_barcode(self):
+        tmpl = self.product.product_tmpl_id
+        tmpl.barcode = '123'
+        self.assertEqual(tmpl.barcode, '123')
+        self.assertEqual(self.product.barcode, '123')
+
+        tmpl.toggle_active()
+
+        tmpl.barcode = '456'
+        tmpl.invalidate_recordset(fnames=['barcode'])
+        self.assertEqual(tmpl.barcode, '456')
+        self.assertEqual(self.product.barcode, '456')
+
     def _update_color_vars(self, ptal):
         self.ptal_color = ptal
         self.assertEqual(self.ptal_color.attribute_id, self.color_attribute)