session insert record error

[tonyshare]

when insert a record to database i got "'NoneType' object is not callable"
`
import tornado.web
from tornado.gen import coroutine
from tornado_sqlalchemy import as_future
from database.tables import *

class UploadFileHandler(BaseHandler):

@coroutine
def post(self):
_file = self.request.files['upload'][0]
_filename = _file["filename"].split(".")[0]
_extension = _file["filename"].split(".")[1]
_mobile = '12345678901'
upload_file = UploadFile(mobile=_mobile,
body=_file['body'],
filename=_filename,
extension=_extension)
with self.make_session() as session:
session.add(upload_file)
yield as_future(session.commit())
`
and the error log is

File "/usr/local/lib/python3.5/dist-packages/tornado/web.py", line 1592, in _execute
result = yield result
File "/usr/local/lib/python3.5/dist-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/local/lib/python3.5/dist-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/srv/www/api/upload_file.py", line 20, in post
yield as_future(session.commit())
File "/usr/local/lib/python3.5/dist-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/concurrent/futures/thread.py", line 55, in run
result = self.fn(*self.args, **self.kwargs)
TypeError: 'NoneType' object is not callable

[tonyshare]

i have solved the problem, just remove the () after commit

yield as_future(session.commit)

[siddhantgoel]

session.commit doesn't return a query object. as_future only works on query objects, hence the exception you received.