[FIX] product: archiving last variant must archive product template

Behavior prior to this fix:

When archiving the last variant on a template, the product template
stays active (contrary to the comment indicating that `toggle_active`
will archive the related product.template if there is only one active
`product.product`).

Behavior after the fix:

When archiving the last variant on a template, the product template is
archived.  When un-archiving that variant, the product template is
unarchived as well, without un-archiving the other variants.

Note: this is a remake of a fix implemented in 77e5472c041e, as that fix
did not correctly count the inactive variants.

opw-2349862

closes odoo/odoo#60635

X-original-commit: 01160ee5e7f726f3035c566a13e26825236dedfd
Signed-off-by: Nicolas Galler <nicocrm@users.noreply.github.com>

3 files changed, 37 insertions, 6 deletions

diff --git a/addons/product/models/product.py b/addons/product/models/product.py
index 7e192b84ee8..fee39fe1d8d 100644
--- a/addons/product/models/product.py
+++ b/addons/product/models/product.py
@@ -689,11 +689,17 @@ class ProductProduct(models.Model):
         return self.product_tmpl_id._is_combination_possible(self.product_template_attribute_value_ids, parent_combination=parent_combination, ignore_no_variant=True)
 
     def toggle_active(self):
-        """ Archiving related product.template if there is only one active product.product """
-        with_one_active = self.filtered(lambda product: len(product.product_tmpl_id.with_context(active_test=False).product_variant_ids) == 1)
-        for product in with_one_active:
-            product.product_tmpl_id.toggle_active()
-        return super(ProductProduct, self - with_one_active).toggle_active()
+        """ Archiving related product.template if there is not any more active product.product
+        (and vice versa, unarchiving the related product template if there is now an active product.product) """
+        result = super().toggle_active()
+        # We deactivate product templates which are active with no active variants.
+        tmpl_to_deactivate = self.filtered(lambda product: (product.product_tmpl_id.active
+                                                            and not product.product_tmpl_id.product_variant_ids)).mapped('product_tmpl_id')
+        # We activate product templates which are inactive with active variants.
+        tmpl_to_activate = self.filtered(lambda product: (not product.product_tmpl_id.active
+                                                          and product.product_tmpl_id.product_variant_ids)).mapped('product_tmpl_id')
+        (tmpl_to_deactivate + tmpl_to_activate).toggle_active()
+        return result
 
 
 class ProductPackaging(models.Model):
diff --git a/addons/product/models/product_template.py b/addons/product/models/product_template.py
index 50685ef014a..3dac988fc3d 100644
--- a/addons/product/models/product_template.py
+++ b/addons/product/models/product_template.py
@@ -424,7 +424,7 @@ class ProductTemplate(models.Model):
             if uom_id and uom_po_id and uom_id.category_id != uom_po_id.category_id:
                 vals['uom_po_id'] = uom_id.id
         res = super(ProductTemplate, self).write(vals)
-        if 'attribute_line_ids' in vals or vals.get('active'):
+        if 'attribute_line_ids' in vals or (vals.get('active') and len(self.product_variant_ids) == 0):
             self._create_variant_ids()
         if 'active' in vals and not vals.get('active'):
             self.with_context(active_test=False).mapped('product_variant_ids').write({'active': vals.get('active')})
diff --git a/addons/product/tests/test_variants.py b/addons/product/tests/test_variants.py
index a0ee4134f0a..e952ad1abe4 100644
--- a/addons/product/tests/test_variants.py
+++ b/addons/product/tests/test_variants.py
@@ -259,6 +259,31 @@ class TestVariants(common.TestProductCommon):
         self.assertTrue(variant_1.active)
         self.assertTrue(template.active)
 
+    def test_archive_all_variants(self):
+        template = self.env['product.template'].create({
+            'name': 'template'
+        })
+        self.assertEqual(len(template.product_variant_ids), 1)
+
+        template.write({
+            'attribute_line_ids': [(0, False, {
+                'attribute_id': self.size_attr.id,
+                'value_ids': [
+                    (4, self.size_attr.value_ids[0].id, self.size_attr_value_s),
+                    (4, self.size_attr.value_ids[1].id, self.size_attr_value_m)
+                ],
+            })]
+        })
+        self.assertEqual(len(template.product_variant_ids), 2)
+        variant_1 = template.product_variant_ids[0]
+        variant_2 = template.product_variant_ids[1]
+        template.product_variant_ids.toggle_active()
+        self.assertFalse(variant_1.active, 'Should archive all variants')
+        self.assertFalse(template.active, 'Should archive related template')
+        variant_1.toggle_active()
+        self.assertTrue(variant_1.active, 'Should activate variant')
+        self.assertFalse(variant_2.active, 'Should not re-activate other variant')
+        self.assertTrue(template.active, 'Should re-activate template')
 
 class TestVariantsNoCreate(common.TestProductCommon):