# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@logilab.fr>
# Date 1364467517 -3600
# Node ID d8b0984c923c45e9be2ef499d4d1f7d31dfd2a85
# Parent  88c71ad83d47b38367d2ccd3cee1a980b40009ff
[migration] fix bug in `CWAttributeAddOp.revertprecommit_event`

The `rdefdef` attribute is set  during the operation execution. In some the
operation crash before this assignment. In such case `revertprecommit` raise an
attribute error crashing the whole process and shadowing the original error.

This changeset detect and Avoid this situation.

diff -r 88c71ad83d47 -r d8b0984c923c hooks/syncschema.py
--- a/hooks/syncschema.py	Thu Mar 21 18:13:31 2013 +0100
+++ b/hooks/syncschema.py	Thu Mar 28 11:45:17 2013 +0100
@@ -507,6 +507,8 @@
 
     def revertprecommit_event(self):
         # revert changes on in memory schema
+        if getattr(self, 'rdefdef', None) is None:
+            return
         self.session.vreg.schema.del_relation_def(
             self.rdefdef.subject, self.rdefdef.name, self.rdefdef.object)
         # XXX revert changes on database