Cleanup, remove some ambiguous code.

Author: WaVEV

django_mongodb/compiler.py

@@ -73,7 +73,6 @@ def _make_result(self, entity, columns):
         """
         result = []
         for name, col in columns:
-            field = col.field
             column_alias = getattr(col, "alias", None)
             obj = (
                 # Use the related object...
@@ -82,8 +81,7 @@ def _make_result(self, entity, columns):
                 if column_alias is not None and column_alias != self.collection_name
                 else entity
             )
-            value = obj.get(name, field.get_default())
-            result.append(value)
+            result.append(obj.get(name, col.field.get_default()))
         return result
 
     def check_query(self):