[英]PyMongo Strange Error “TypeError: 'Database' object is not callable.”
I got a strange error. 我遇到一个奇怪的错误。
Source: __init__.py
资料来源: __init__.py
import os
import base64
import uuid
import tornado.web
import tornado.httpserver
import tornado.locale
import tornado.ioloop
import tornado.options
from tornado.options import define, options
from pymongo.connection import Connection
from pymongo.database import Database
from handlers import api
#from auth import AuthLoginHandler
#from auth import AuthLogoutHandler
#from auth import AuthFirstRunHandler
from handlers import home
## Options
define("listen_port", default = 7456, type = "int",
help = "bind to port")
define("listen_address", default = None, type = "string",
help = "bind to address")
define("static_path", default = os.path.join(os.path.dirname(__file__), "static"), type = "string",
help = "directory to store static resource")
# http://www.v2ex.com/t/12646
define("cookie_secret", default = base64.b64encode(uuid.uuid4().bytes + uuid.uuid4().bytes), type = "string",
help = "cookie")
define("mongo_host", default = "127.0.0.1", type = "string",
help = "hostname or ip of mongo host")
define("mongo_port", default = 27017, type = "int",
help = "port of mongo host")
define("mongo_collection", default = "meowth", type = "string",
help = "collection name")
tornado.options.parse_command_line()
class Application(tornado.web.Application):
def __init__(self):
tornado.web.Application.__init__(self, [
(r"/i", home.HomeHandler),
# (r"/auth/login", AuthLoginHandler),
# (r"/auth/logout", AuthLogoutHandler),
# (r"/auth/install", AuthFirstRunHandler),
# (r"/backstage", BackstageHomeHandler),
(r"/api/cluster", api.APIHandler),
(r"/api/user", api.APIHandler),
(r"/api/connection", api.APIHandler),
(r"/api/control", api.APIHandler),
(r"/static/(.*)", tornado.web.StaticFileHandler, { "path" : options.static_path })
],** dict(
xsrf_cookies = True,
cookie_secret = options.cookie_secret
))
# init database connection
self.mongo = Database(
Connection(
options.mongo_host,
options.mongo_port
),
options.mongo_collection
)
#self.mongo = self.mongoConnection[options.mongo_collection]
#self.mongo = self.mongoConnection.meowth
def main():
if options.listen_address == None:
tornado.httpserver.HTTPServer(Application()).listen(options.listen_port)
else:
tornado.httpserver.HTTPServer(Application()).listen(options.listen_port, address = options.listen_address)
tornado.ioloop.IOLoop.instance().start()
if __name__ == "__main__":
main()
base.py
# -*- coding: utf8 -*-
import tornado.web
import pymongo
class BaseHandler(tornado.web.RequestHandler):
def __init__(self, application, request, **kwargs):
tornado.web.RequestHandler.__init__(self, application, request, **kwargs)
self.session_id = self.get_secure_cookie("meowth_session")
self.session = {}
@property
def db(self):
print self.application.mongo
return self.application.mongo
def init_session(self):
if not self.session_id:
self.session_id = self.db().meowth_sessions.save(
{"data" : self.session}
)
else:
self.session = self.db().meowth_sessions.find_one(
{"_id" : self.session_id}
)
def flush_session(self):
self.db().meowth_sessions.save(
{"data" : self.session,
"_id" : self.session_id
}
)
def is_spider(self):
# https://bitbucket.org/keakon/doodle/src/3ddf46ac59e7/zh-CN/common.py#cl-512
user_agent = self.request.headers["User-Agent"]
if 'bot' in user_agent or 'spider' in user_agent:
return True
return False
Error: 错误:
> [root@CloudK02 Meowth]# ./Meowth-Web Database(Connection('127.0.0.1',
> 27017), u'meowth') [E 120219 15:07:54 web:1031] Uncaught exception GET
> /i (122.94.31.186)
> HTTPRequest(protocol='http', host='us1.loli.vg:7456', method='GET', uri='/i', version='HTTP/1.1', remote_ip='122.94.31.186',
> body='', headers={'Accept-Language': 'en-US,en;q=0.8',
> 'Accept-Encoding': 'gzip,deflate,sdch', 'Host': 'us1.loli.vg:7456',
> 'Accept':
> 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
> 'User-Agent': 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.11 (KHTML,
> like Gecko) Chrome/17.0.963.56 Safari/535.11', 'Accept-Charset':
> 'ISO-8859-1,utf-8;q=0.7,*;q=0.3', 'Connection': 'keep-alive',
> 'Cookie': 'PHPSESSID=rm4ght6ivop9a1hf5oogcft3j4;
> session_id="MzZkODNiMWMyZjczOWZhNzcxYjU4YTNjNzVhZjA4Yzc=|1329674350|2562f7ed871c1ca3e24dcb5891d6e753cfacfa44";
> rock_format=json', 'Cache-Control': 'max-age=0'})
> Traceback (most recent call last):
> File "/usr/local/lib/python2.6/site-packages/tornado/web.py", line 988, in _execute
> getattr(self, self.request.method.lower())(*args, **kwargs)
> File "/home/aveline/Meowth/web/handlers/home.py", line 7, in get
> self.init_session()
> File "/home/aveline/Meowth/web/handlers/base.py", line 19, in init_session
> self.session_id = self.db().meowth_sessions.save(
> File "build/bdist.linux-x86_64/egg/pymongo/database.py", line 696, in __call__
> "failing because no such method exists." % self.__name)
> TypeError: 'Database' object is not callable. If you meant to call the 'meowth' method on a 'Connection' object it is failing because no
> such method exists.
It works well if I use self.mongo in class Application . 如果我在Application类中使用self.mongo,它将很好地工作。 But I got an error if I use it in class BaseHandler . 但是,如果在类BaseHandler中使用它,则会出现错误。
Why? 为什么?
You've defined db
as a property, meaning that you don't have to call it. 您已将db
定义为属性,这意味着您不必调用它。 But then you call it! 但是那你就叫它!
Either remove the @property
or use self.db
instead of self.db()
. 或者删除@property
或使用self.db
代替self.db()
As always, Python's error messages are informative and you should look at them! 和往常一样,Python的错误消息是有益的,您应该仔细阅读它们! In this case, you can see 在这种情况下,您可以看到
TypeError: 'Database' object is not callable. If you meant to call the 'meowth' method on a 'Connection' object it is failing because no such method exists.
which means that you are calling (ie like a function) a database object somewhere. 这意味着您正在某个地方调用(即像一个函数一样)数据库对象。 Where? 哪里?
File "/home/aveline/Meowth/web/handlers/base.py", line 19, in init_session
self.session_id = self.db().meowth_sessions.save(
See? 看到? self.db
is a property, so gives you self.application.mongo
. self.db
是一个属性,因此为您提供了self.application.mongo
。 Then you call it, so the above line is equivalent to 然后调用它,所以上面的行等效于
self.session_id = self.application.mongo().meowth_sessions.save(
which is obviously wrong. 这显然是错误的。
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