writer/save 时提醒 global name 'user' is not defined

[yoyicue]

Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 513, in __call__
handler.post(*groups)
File "/base/data/home/apps/appsname/20101030155700.345859091870208681/writer.py", line 469, in post
'user_email' : user.email(),
NameError: global name 'user' is not defined

1.9.1版本来自于github
囧 这个地方怎么会要email呢