Ticket #10156: multiple-model-choice-field.diff

django/forms/models.py

@@ -738 +738 @@
         if not isinstance(value, (list, tuple)):
             raise ValidationError(self.error_messages['list'])
         final_values = []
+        qs = self.queryset.filter(pk__in=value)
+        pks = set([force_unicode(o.pk) for o in qs])
         for val in value:
-            try:
-                obj = self.queryset.get(pk=val)
-            except self.queryset.model.DoesNotExist:
+            if force_unicode(val) not in pks:
                 raise ValidationError(self.error_messages['invalid_choice'] % val)
-            else:
-                final_values.append(obj)
-        return final_values
+        return qs