Ticket #9885: query.diff

django/db/models/query.py

@@ -379 +379 @@
         """
         Deletes the records in the current QuerySet.
         """
+        from django.db.models import signals
+        
         assert self.query.can_filter(), \
                 "Cannot use 'limit' or 'offset' with delete."
-
+        
+        signals.pre_batch_delete.send(sender=self.model, queryset=self)
         del_query = self._clone()
 
         # Disable non-supported fields.
@@ -403 +406 @@
 
         # Clear the result cache, in case this QuerySet gets reused.
         self._result_cache = None
+        signals.post_batch_delete.send(sender=self.model, queryset=self)
+        
     delete.alters_data = True
 
     def update(self, **kwargs):
@@ -410 +415 @@
         Updates all elements in the current QuerySet, setting all the given
         fields to the appropriate values.
         """
+        from django.db.models import signals
+        
         assert self.query.can_filter(), \
                 "Cannot update a query once a slice has been taken."
+        signals.pre_batch_update.send(sender=self.model, queryset=self, raw=kwargs)
         query = self.query.clone(sql.UpdateQuery)
         query.add_update_values(kwargs)
         rows = query.execute_sql(None)
+        signals.post_batch_update.send(sender=self.model, queryset=self, raw=kwargs)
         transaction.commit_unless_managed()
         self._result_cache = None
         return rows