提交后显示的:
Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/
__init__.py", line 517, in __call__
handler.post(*groups)
File "/base/data/home/apps/v2ex/1.348987195219245336/
topic.py", line 265, in post
topic.title = topic_title
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/
__init__.py", line 544, in __set__
value = self.validate(value)
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/db/
__init__.py", line 2437, in validate
raise BadValueError('Property %s is not multi-line' %
self.name)
BadValueError: Property title is not multi-line