Fix issue #153

parse_rest/datatypes.py

@@ -126,7 +126,7 @@ class EmbeddedObject(ParseType):
         return klass(**kw)
 
 
-@complex_type()
+@complex_type('Relation')
 class Relation(ParseType):
     @classmethod
     def from_native(cls, **kw):
@@ -178,10 +178,9 @@ class Relation(ParseType):
         return repr
 
     def _to_native(self):
-        return {
-            '__type': 'Relation',
-            'className': self.relatedClassName
-        }
+        # Saving relations is a separate operation and thus should never need
+        # to convert this field _to_native
+        return None
 
     def add(self, objs):
         """Adds a Parse.Object or an array of Parse.Objects to the relation."""

parse_rest/user.py

@@ -118,7 +118,7 @@ class User(ParseResource):
 
     def __repr__(self):
         return '<User:%s (Id %s)>' % (getattr(self, 'username', None), self.objectId)
-    
+
     def removeRelation(self, key, className, objectsId):
         self.manageRelation('RemoveRelation', key, className, objectsId)
 
@@ -139,7 +139,19 @@ class User(ParseResource):
                 }
             }
         self.__class__.PUT(self._absolute_url, **payload)
-        self.__dict__[key] = ''
+
+        # Commented this line out to fix the saving relation issue --
+        # it's better to just return None in Relation._to_native
+        # self.__dict__[key] = ''
+
+    def relation(self, key):
+        if not hasattr(self, key):
+            return Relation(parentObject=self, key=key)
+        try:
+            return getattr(self, key).with_parent(parentObject=self, key=key)
+        except:
+            raise ParseError("Column '%s' is not a Relation." % (key,))
+
 
 
 User.Query = QueryManager(User)