Python “烧瓶登录”；load#u user（）缺少1个必需的位置参数：'；用户id'&引用；

我目前正在使用Flask Login进行身份验证，但是我得到一个错误，即

load\u user（）缺少一个必需的位置参数：“user\u id”

，但是当我调试我的应用程序时，user\u id存在，并且被正确地传递到

Login\u user（）

函数中（并存储在

会话['user\u id']

变量中）

以下是我的代码，用于将用户登录，然后导航到主页：

@app.route('/', methods=['GET', 'POST'])
def login():
    login_form = LoginForm()
    username = login_form.username.data
    password = login_form.password.data
    if user_details_valid(username, password):
        login_user(user_service.get_user_object(username))
        return redirect(url_for(‘home’))
    return render_template('login.html', form=login_form)

@app.route(‘/home’)
@login_required
def home():
    return render_template(“home.html")

用户模型如下所示：

class User(UserMixin):

def __init__(self, username):
    self.username = username
    self.email = None
    self.password = None
    self.user_id = None

def is_authenticated(self):
    return True

def is_active(self):
    return True

def is_anonymous(self):
    return False

def get_id(self):
    return str(self.user_id)

def set_id(self, user_id):
    self.user_id = user_id

def set_password(self, password_hash):
    self.password = password_hash

def set_email(self, email):
    self.email = email

@login.user_loader
def load_user(self, user_id):
    return self.collection.find_one({"user_id": user_id})

我得到的stacktrace是：

File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask_login.py", line 756, in decorated_view
    elif not current_user.is_authenticated():
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/werkzeug/local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/werkzeug/local.py", line 306, in _get_current_object
    return self.__local()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask_login.py", line 46, in <lambda>
    current_user = LocalProxy(lambda: _get_user())
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask_login.py", line 794, in _get_user
    current_app.login_manager._load_user()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask_login.py", line 363, in _load_user
    return self.reload_user()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask_login.py", line 325, in reload_user
    user = self.user_callback(user_id)
TypeError: load_user() missing 1 required positional argument: 'user_id'

---

为了解决此错误，我将我的

用户\u加载器

放在我的

\uuu init\uuuu.py

文件中，如中所示

然而，这并不是一个完美的答案，因为这两个答案都没有显示出来，事实上，Miguel's guide和RunningCode's guide在应用程序的不同部分都有用户加载程序

这个解决方案没有意义，因为我必须从我的

\uuuu init\uuuu.py

内部访问我的数据库，这看起来非常混乱，但我能够修复错误并正确登录

---

该错误可能是因为我的

\uuuu init\uuuuuuy.py

似乎加载了两次，我在某个地方找到了另一个答案，说明了由于应用程序运行的两个实例导致的类似错误。

我得到了相同的错误。初始化LoginManager时，我忘了将应用程序的实例作为参数传递

app/init.py

#...
from flask_login import LoginManager
app = Flask(__name__)
# ...
login = LoginManager(app)

---

你提供回拨了吗？更新了我的帖子以包含它。我认为它与调试

会话时一样工作正常。get（'user\u id'）

正确返回用户id，似乎只有在加载带有

@login\u required

装饰器的主页时才会发生错误