get_all_variations: return an empty dict in the list if there are no

properties

src/tixlbase/models.py

@@ -555,6 +555,7 @@ class Item(models.Model):
         result = []
         for comb in product(*[prop.values.all() for prop in all_properties]):
             if len(comb) == 0:
+                result.append({})
                 continue
             key = []
             var = {}

src/tixlbase/tests/test_models.py

@@ -33,7 +33,8 @@ class ItemVariationsTest(TestCase):
 
         # No properties available
         v = i.get_all_variations()
-        self.assertEqual(len(v), 0)
+        self.assertEqual(len(v), 1)
+        self.assertEqual(v[0], {})
 
         # One property, no variations
         p = Property.objects.get(event=e, name='Size')