check if the item is not none or do the comparing

Author: tlfung0219

django_mock_queries/utils.py

@@ -140,11 +140,11 @@ def is_match(first, second, comparison=None):
         COMPARISON_IEXACT: lambda: first.lower() == second.lower(),
         COMPARISON_CONTAINS: lambda: second in first,
         COMPARISON_ICONTAINS: lambda: second.lower() in first.lower(),
-        COMPARISON_GT: lambda: first > second,
-        COMPARISON_GTE: lambda: first >= second,
-        COMPARISON_LT: lambda: first < second,
-        COMPARISON_LTE: lambda: first <= second,
-        COMPARISON_IN: lambda: first in second,
+        COMPARISON_GT: lambda: first > second if first else False,
+        COMPARISON_GTE: lambda: first >= second if first else False,
+        COMPARISON_LT: lambda: first < second if first else False,
+        COMPARISON_LTE: lambda: first <= second if first else False,
+        COMPARISON_IN: lambda: first in second if first else False,
         COMPARISON_STARTSWITH: lambda: first.startswith(second),
         COMPARISON_ISTARTSWITH: lambda: first.lower().startswith(second.lower()),
         COMPARISON_ENDSWITH: lambda: first.endswith(second),