Ticket #11007: modelchanges.patch

django/db/models/base.py

@@ -593 +593 @@
 
     def prepare_database_save(self, unused):
         return self.pk
+    
+    def changes(self):
+        fields = [x.name for x in self._meta._fields() if not (x.name.endswith('_ptr_id') or x.name.endswith('_ptr'))]
+        if not self.pk:
+            return dict([(x, (None, getattr(self, x))) for x in fields])
+        old = self.__class__.objects.get(pk=self.pk)
+        return dict([(x, (getattr(old, x), getattr(self, x))) for x in fields if getattr(self, x) != getattr(old, x)])
 
-
 ############################################
 # HELPER FUNCTIONS (CURRIED MODEL METHODS) #
 ############################################