Fixed #10184: QueryDicts with multiple values can now be safely pickled. Thanks, Alex Gaynor.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10240 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/datastructures.py

@@ -223,6 +223,17 @@ class MultiValueDict(dict):
                              copy.deepcopy(value, memo))
         return result
     
+    def __getstate__(self):
+        obj_dict = self.__dict__.copy()
+        obj_dict['_data'] = dict([(k, self.getlist(k)) for k in self])
+        return obj_dict
+    
+    def __setstate__(self, obj_dict):
+        data = obj_dict.pop('_data', {})
+        for k, v in data.items():
+            self.setlist(k, v)
+        self.__dict__.update(obj_dict)
+        
     def get(self, key, default=None):
         """
         Returns the last data value for the passed key. If key doesn't exist

tests/regressiontests/httpwrappers/tests.py

@@ -396,10 +396,18 @@ u'\ufffd'
 # Pickling a QueryDict #
 ########################
 >>> import pickle
+>>> q = QueryDict('')
+>>> q1 = pickle.loads(pickle.dumps(q, 2))
+>>> q == q1
+True
 >>> q = QueryDict('a=b&c=d')
 >>> q1 = pickle.loads(pickle.dumps(q, 2))
 >>> q == q1
 True
+>>> q = QueryDict('a=b&c=d&a=1') 
+>>> q1 = pickle.loads(pickle.dumps(q, 2))
+>>> q == q1 
+True
 
 ######################################
 # HttpResponse with Unicode headers  #