fix bug exposed by earlier change to defaulting of *dbm property values

Author: Richard Jones

roundup/backends/back_anydbm.py

@@ -15,7 +15,7 @@
 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 # 
-#$Id: back_anydbm.py,v 1.163 2004-07-20 22:56:18 richard Exp $
+#$Id: back_anydbm.py,v 1.164 2004-07-21 00:51:21 richard Exp $
 '''This module defines a backend that saves the hyperdatabase in a
 database chosen by anydbm. It is guaranteed to always be available in python
 versions >2.1.1 (the dumbdbm fallback in 2.1.1 and earlier has several
@@ -1383,6 +1383,8 @@ def lookup(self, keyvalue):
                 node = self.db.getnode(self.classname, nodeid, cldb)
                 if node.has_key(self.db.RETIRED_FLAG):
                     continue
+                if not node.has_key(self.key):
+                    continue
                 if node[self.key] == keyvalue:
                     return nodeid
         finally: