IdAsReferenceMixin.getReference() is called even in portal_property_sheets...

IdAsReferenceMixin.getReference() is called even in portal_property_sheets migration, so we need a backward compatibility code here, otherwise we cannot safely update 'somehow migrated' instance.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44449 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/id_as_reference.py

@@ -31,6 +31,7 @@ from AccessControl import ClassSecurityInfo
 from Products.ERP5Type import Permissions, PropertySheet
 from Products.CMFActivity.Errors import ActivityPendingError
 from zLOG import LOG, WARNING
+from Acquisition import aq_base
 
 def IdAsReferenceMixin(suffix):
   suffix_index = - len(suffix)
@@ -71,6 +72,9 @@ def IdAsReferenceMixin(suffix):
       id = self.id
       if id[suffix_index:] == suffix:
         return id[:suffix_index]
-      return self._baseGetReference(*args)
+      try:
+        return self._baseGetReference(*args)
+      except AttributeError:
+        return getattr(aq_base(self), 'default_reference', (args or [None])[0])
 
   return IdAsReferenceMixin