Applied suggested fix at django-tastypie#1475

tastypie/resources.py

@@ -1794,7 +1794,7 @@ def __new__(cls, name, bases, attrs):
         include_fields = specified_fields
 
         if include_fields is None:
-            if meta and meta.object_class:
+            if meta and getattr(meta, 'object_class'):
                 include_fields = [f.name for f in meta.object_class._meta.fields]
             else:
                 include_fields = []