Fixed Django 1.8 issue

Author: syrusakbary

graphene_django/tests/test_query.py

@@ -9,7 +9,7 @@
 from graphene.relay import Node
 
 from ..utils import DJANGO_FILTER_INSTALLED
-from ..compat import MissingType, RangeField
+from ..compat import MissingType, JSONField
 from ..fields import DjangoConnectionField
 from ..types import DjangoObjectType
 from .models import Article, Reporter
@@ -100,7 +100,7 @@ def resolve_reporter(self, *args, **kwargs):
     assert result.data == expected
 
 
-@pytest.mark.skipif(RangeField is MissingType,
+@pytest.mark.skipif(JSONField is MissingType,
                     reason="RangeField should exist")
 def test_should_query_postgres_fields():
     from django.contrib.postgres.fields import IntegerRangeField, ArrayField, JSONField, HStoreField