蒙哥因属性

Question

我正在尝试使用Flask Mongoengine和Flask Login为应用程序编写授权代码。我得到了一个奇怪的错误：

File "/usr/lib/python3.5/site-packages/mongoengine/base/document.py", line 188, in __setattr__
    super(BaseDocument, self).__setattr__(name, value)
  File "/usr/lib/python3.5/site-packages/mongoengine/base/fields.py", line 132, in __set__
    if instance._initialised:
AttributeError: _initialised

我的模型.py公司名称：

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我试着在班上占上风，但没用。在

https://github.com/MongoEngine/flask-mongoengine/issues/156

Answer 1

Mongoengine不需要您定义一个。在

class User(db.Document):
    email = db.StringField(required=True)
    first_name = db.StringField(max_lenght=40, required=True)
    last_name = db.StringField(max_lenght=40, required=True)
    password = db.StringField(required=True)

    def clean(self):
        # clean will be called when you call .save()
        # You can do whatever you'd like to clean data before save
        self.password = str(self.password)

那你要做的就是

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Answer 2

未来的读者应该知道，在knittledan答案中，clean()在每次save()调用之前被调用，因此如果它用于散列模型中的密码字段，例如：

def clean(self):
    self.password = bcrypt.generate_password_hash(self.password).decode('utf-8')

密码会不断被覆盖，这是不需要的。解决方法是使用一个额外的字段，例如：password_hashed = db.BooleanField(default=False)

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Answer 3

解决这个问题的方法是，您需要像这样调用超类的构造函数

class User(db.Document):
    email = db.StringField(required=True)
    first_name = db.StringField(max_lenght=40, required=True)
    last_name = db.StringField(max_lenght=40, required=True)
    password = db.StringField(required=True)

    def __init__(self, email, first_name, last_name, password, *args, **kwargs):
        super(User, self).__init__(*args, **kwargs)
        self.email = email
        self.first_name = first_name
        self.last_name = last_name
        self.password = password

    def is_authenticated(self):
        return True

    def is_active(self):
        return True

    def is_anonymous(self):
        return False

   def get_id(self):
        return self.email