NEW product_variant_so_always for 11.0

Adds boolean on the `product.template` form to force the 'dynamic' mode for NOT creating variants on `product.template` save, but rather when added to sale orders.

product_variant_so_always/tests/__init__.py

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

product_variant_so_always/tests/test_product_creation.py

@@ -0,0 +1,45 @@
+from odoo.tests import common
+from odoo.exceptions import UserError
+
+
+class TestProductCreation(common.TransactionCase):
+    def setUp(self):
+        super(TestProductCreation, self).setUp()
+        self.attrs = []
+
+        # Create 1000 combinations
+        for a in range(1, 4):
+            attribute = self.env['product.attribute'].create({
+                'name': 'Attr ' + str(a),
+                'type': 'radio',
+                'create_variant': 'always',
+            })
+            self.attrs.append(attribute)
+            for v in range(1, 11):
+                self.env['product.attribute.value'].create({
+                    'name': 'Value ' + str(v),
+                    'attribute_id': attribute.id,
+                })
+        # Create 1 more...
+        self.env['product.attribute.value'].create({
+            'name': 'Value 11',
+            'attribute_id': self.attrs[0].id,
+        })
+
+    def test_01_product_template(self):
+        product_tmpl = self.env['product.template'].create({
+            'name': 'Test Product',
+            'type': 'product',
+        })
+        attr_line_model = self.env['product.template.attribute.line']
+        for a in self.attrs:
+            attr_line_model.create({
+                'product_tmpl_id': product_tmpl.id,
+                'attribute_id': a.id,
+                'value_ids': [(6, 0, a.value_ids.ids)],
+            })
+        with self.assertRaises(UserError):
+            product_tmpl.create_variant_ids()
+
+        product_tmpl.always_variant_on_so = True
+        product_tmpl.create_variant_ids()