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我将 mongokit 与烧瓶一起使用，每次尝试使用我创建的集合时，都会收到错误消息No collection found

我在一个单独的文件 models.py 中定义了我的集合。它看起来像这样：

from mongokit import Connection, Document
import os
import sys

here = os.path.dirname(os.path.abspath(__file__))
path = os.path.abspath(os.path.join(here, 'settings'))
sys.path.append(path)
from settings import base as settings

connection = Connection()

@connection.register
class Contact(Document):
    __database__ = settings.MONGO_DBNAME
    __collection__ = "Contact"

    structure = {
        "name":unicode,
        "mobile_number":unicode,
    }

    required_fields = ["name"]


@connection.register
class User(Document):
    __database__ = settings.MONGO_DBNAME
    __collection__ = 'User'

    structure = {
        "username":unicode,
        "twitter_access_token":unicode,
        "twitter_token_secret":unicode,
        "contacts":[Contact]
    }
    required_fields = ["username"]
    default_values = {
            "twitter_access_token": "",
            "twitter_token_secret": ""
        }

但后来我尝试了：

>>> from models import User
>>> u = User()
>>> u["username"] = "somename"
>>> u.save()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/fernandocezar/.virtualenvs/contacts/lib/python2.7/site-packages/mongokit/document.py", line 404, in save
    self.validate(auto_migrate=False)
  File "/Users/fernandocezar/.virtualenvs/contacts/lib/python2.7/site-packages/mongokit/document.py", line 230, in validate
    (size_limit, size_limit_str) = self._get_size_limit()
  File "/Users/fernandocezar/.virtualenvs/contacts/lib/python2.7/site-packages/mongokit/document.py", line 214, in _get_size_limit
    server_version = tuple(self.connection.server_info()['version'].split("."))
  File "/Users/fernandocezar/.virtualenvs/contacts/lib/python2.7/site-packages/mongokit/document.py", line 622, in __getattribute__
    raise ConnectionError('No collection found') 
mongokit.mongo_exceptions.ConnectionError: No collection found

我按照本教程进行操作，但甚至符号都不起作用connection.<dbname>.<collection>()。是的，确实有这样的收藏。

我错过了什么？

4

1 回答 1

3

引用您链接的教程：

为了避免重复，让我们在 Document 定义中指定数据库和集合名称：

@connection.register
class BlogPost(Document):
    __collection__ = 'blog_posts'
    __database__ = 'blog'
    structure = {...}

>>> bp = connection.BlogPost()

在shell示例中，模型对象是通过connection对象构造的。在你的情况下，你只是在做user = User(). connection尝试通过您用于注册模型的同一实例创建用户（例如user = connection.User()）。

于 2012-10-19T19:34:12.607 回答