asyncmongo

AsyncMongo is an asynchronous library for accessing mongo which is built on the tornado ioloop.

Installation

Installing: pip install asyncmongo

Usage

asyncmongo syntax strives to be similar to pymongo.

import asyncmongo
import tornado.web

class Handler(tornado.web.RequestHandler):
    @property
    def db(self):
        if not hasattr(self, '_db'):
            self._db = asyncmongo.Client(pool_id='mydb', host='127.0.0.1', port=27017, maxcached=10, maxconnections=50, dbname='test')
        return self._db

    @tornado.web.asynchronous
    def get(self):
        self.db.users.find({'username': self.current_user}, limit=1, callback=self._on_response)
        # or
        # conn = self.db.connection(collectionname="...", dbname="...")
        # conn.find(..., callback=self._on_response)

    def _on_response(self, response, error):
        if error:
            raise tornado.web.HTTPError(500)
        self.render('template', full_name=response['full_name'])

About

Some features are not currently implemented:

directly interfacing with indexes, dropping collections
retrieving results in batches instead of all at once (asyncmongo's nature means that no calls are blocking regardless of the number of results you are retrieving)
tailable cursors #15