Question about getting asyncmongo query result in Tornado web

Question

Hi I know this is a common issue for user who is not familiar with async method.... i want to query db with user id using asyncmongo to check if the user log on, but obviously this doesn't work and i don't want to use self.render in call back.

Thanks for your help.

class MainPage(BaseHandler):

def get(self):

    if not self.current_user:
     ####  get no result here 
    .............

get_current_user function using asyncmongo method:

def get_current_user(self):
    user_id = self.get_secure_cookie("user")
    if not user_id: return None 
    self.db.users.find({'user_id': bson.ObjectId(str(user_id))}, limit=1, callback=self._on_response)

def _on_response(self, response, error):
    if error:
        raise tornado.web.HTTPError(500)
    how to return the value of response instead of self.render('template',response) ?

score 2 · Answer 1 · edited May 23 '17 at 09:58

2

see Tornado Asynchronous Handler

edited May 23 '17 at 09:58

Community

1
1

answered Apr 07 '11 at 14:08

Schildmeijer

20,702
12
62
79

Thanks, i will use sync method to get the value. – Blurmylife Apr 08 '11 at 11:33

score -3 · Answer 2 · answered Sep 20 '12 at 18:06

-3

def _on_response(self, response, error):
    if error:
        raise tornado.web.HTTPError(500)
    self.render(str(response))

answered Sep 20 '12 at 18:06

Fabio Batalha

1

Question about getting asyncmongo query result in Tornado web

2 Answers2