add test exclusion for postgres as it uses transaction timestamp

docs/releases.md

@@ -1,3 +1,7 @@
+# 0.3.10
+
+* Fix 
+
 # 0.3.9
 
 *  Fix json schema generation as of [#19][#19]

tests/test_server_default.py

@@ -77,6 +77,9 @@ async def test_model_creation():
 
             p2 = await Product.objects.create(name='Test3')
             assert p2.created is not None
-            assert p1.created != p2.created
             assert p2.company == 'Acme'
             assert p2.sort_order == 10
+
+            if Product.db_backend_name() != 'postgresql':
+                # postgres use transaction timestamp so it will remain the same
+                assert p1.created != p2.created