Ticket #5758: 5758_fix.diff

django/newforms/models.py

@@ -269 +269 @@
             # update/save existing instances
             for form in self.change_forms:
                 instance = instances[form.cleaned_data[self.model._meta.pk.attname]]
-                if form.cleaned_data[DELETION_FIELD_NAME]:
+                if form.cleaned_data.get(DELETION_FIELD_NAME, False):
                     instance.delete()
                 else:
                     saved_instances.append(self.save_instance(form, instance, commit=commit))