more fixes for util.getMigratedItem()

Fix Typo

loops/util.py

@@ -169,11 +169,11 @@ def getItem(uid, intIds=None, storage=None):
     return obj
 
 def getMigratedItem(uid, storage):
-    t = self.getUidTable
-    stmt = t.select().where(t.c.legacy == int(uid))
+    t = storage.getUidTable()
+    stmt = t.select().with_only_columns(t.c.prefix, t.c.id).where(t.c.legacy == int(uid))
     newId = storage.session.execute(stmt).first()
     if newId is not None:
-        return storage.getItem('%s-%i' % newUid)
+        return storage.getItem('%s-%i' % tuple(newId))
     return None
 
 def getObjectForUid(uid, intIds=None):