Use a tuple in the last commit instead of a list

Jan Schrewe · Jan Schrewe · commit ec80e4c16063 · 2013-09-25T18:48:25.000+02:00
diff --git a/mongodbforms/documents.py b/mongodbforms/documents.py
@@ -407,7 +407,7 @@ def _post_clean(self):
         
         # Call the model instance's clean method.
         original_fields = self.instance._fields_ordered
-        to_check = [f for f in original_fields if f not in exclude]
+        to_check = tuple([f for f in original_fields if f not in exclude])
         self.instance._fields_ordered = to_check
         try:
             self.instance.validate()
