Allow usage of several iterators on ModelBase

Storing iterator object as attribute of model doesn't allow
to use several iterators at the same time

Now the new Iterator object which is created by iter()
stores model object, and in such way several iterators can be
created and work without interfering

Change-Id: I5806877a2d15d449b948307a522bf2fb56bf8110

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/sqlalchemy/test_models.py b/tests/sqlalchemy/test_models.py
index ea15532..fe5d2f0 100644
--- a/tests/sqlalchemy/test_models.py
+++ b/tests/sqlalchemy/test_models.py
@@ -89,6 +89,15 @@ class ModelBaseTest(test_base.DbTestCase):
 
         self.assertEqual(min_items, found_items)
 
+    def test_modelbase_several_iters(self):
+        mb = ExtraKeysModel()
+        it1 = iter(mb)
+        it2 = iter(mb)
+
+        self.assertFalse(it1 is it2)
+        self.assertEqual(dict(it1), dict(mb))
+        self.assertEqual(dict(it2), dict(mb))
+
     def test_extra_keys_empty(self):
         """Test verifies that by default extra_keys return empty list."""
         mb = models.ModelBase()