Ticket #5101: validate-on-save.diff

django/db/models/base.py

@@ -282 +282 @@
                 error_dict[f.name] = errors
         return error_dict
 
+    def validate_on_save(self):
+        """
+        perform validation before saving
+        """
+        errors = self.validate()
+        if len(errors):
+            from django.core import validators
+            raise validators.ValidationError (errors)
+        self.save()
+
     def _collect_sub_objects(self, seen_objs):
         """
         Recursively populates seen_objs with all objects related to this object.