Flask MongoKit 'Collection' 对象不可调用

Question

我以这个 http://pythonhosted.org/Flask-MongoKit/为例

我只是想获取用于编写单元测试的文档实例，但它不起作用。下面是测试代码：

import unittest
from tests import app, db, ctx
from word.models import Word
class ModelWordTestCase(unittest.TestCase):
    def setUp(self):
        pass
    def test_model_word(self):
        print db.Word
        word = db.Word()
        self.assertIsNotNone(word)
    def tearDown(self):
        pass

词类

from flask.ext.mongokit import Document
from core import db
@db.register
class Word(Document):
    __collection__ = 'words'
    use_dot_notation = True
    STATUS = {
        "approved" : 1,
        "pending" : 0,
        "rejected" : -1,
    }
    structure = {
        'lang': unicode,
        'local': unicode,
        'pronunciation' : unicode,
        'meaning': unicode,
        }

令人惊讶的数据库。Word 在打印print db.Word语句时存在，但不能像我上面提到的教程中所做的那样调用它来创建新实例。这是测试的输出：

Collection(Database(MongoClient('localhost', 27017), u'words_test'), u'Word')
E
======================================================================
ERROR: test_model_word (tests.model_tests.ModelWordTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "tests/model_tests.py", line 14, in test_model_word
    word = db.Word()
  File "/usr/local/lib/python2.7/dist-packages/mongokit/collection.py", line 64, in __call__
    self.__name)
TypeError: 'Collection' object is not callable. If you meant to call the 'Word' method on a 'Database' object it is failing because no such method exists.
----------------------------------------------------------------------
Ran 1 test in 0.002s
FAILED (errors=1)

如何解决此问题并获取Word文档的实例，以便我可以创建和保存记录。

Answer 1

我认为您在测试中使用了错误的数据库实例。您应该使用用于注册模型的同一数据库实例。所以，我不知道你的代码是如何构建的，但乍一看，你应该从你的模型中导入数据库：

>>> from word.models import db
>>> db.Word.find()

或者也许

>>> from core import db