FlaskLogin：用户加载程序在哪里是否应该定义回调？

Question

我不熟悉python编码，但很快就开始尝试flask。我在使用flask登录扩展时遇到问题 这里我做了一个简单的应用程序，这是一个博客。这个博客只供一个人使用。在

我无法理解为什么用户加载程序decorator不工作，这是在中定义的模型.py. 我得到异常应用程序非类型对象不可调用。 我的应用程序结构是这样的

.
|-- app
|   |-- admin
|   |   |-- __init__.py
|   |   |-- static
|   |   |-- templates
|   |   `-- views.py
|   |-- config.py
|   |-- __init__.py
|   |-- main
|   |   |-- __init__.py
|   |   |-- static
|   |   |-- templates
|   |   `-- views.py
|   `-- models.py
`-- launch.py

应用程序init

^{pr2}$

在应用程序模型我定义了不从数据库加载用户的User类。实际上，它只是从配置中加载用户。在同一个文件中，我还定义了用户加载程序回调

class User(UserMixin):
    def __init__(self):
        self.id='1'
        self.name=app_myblog.config['USERNAME']
        self.password=app_myblog.config['PASSWORD']

    def get_id(self):
        return unicode(id)

@login_manager.user_loader
def load_user(userid):
    u=User()
    if u.get_id()==userid:
        return u
    else:
        return None

管理员init

from flask import Blueprint

admin=Blueprint('admin',__name__,template_folder='templates',static_folder='static')
from . import views

在管理视图在

from flask import render_template,request,redirect,url_for
from . import admin
from flask.ext.login import login_required,login_user
from flask_wtf.form import Form
from wtforms import StringField,PasswordField,SubmitField
from ..models import User



class LoginForm(Form):
    username=StringField('Username')
    password=PasswordField('Password')
    submit=SubmitField('Login')


@admin.route('/')
@login_required
def index():
    return render_template('admin_home.html')


@admin.route('/login',methods=['GET','POST'])
def login():
    form=LoginForm()
    if form.validate_on_submit():
        login_user(User())
        nextx = request.args.get('next')
        return redirect(nextx or url_for('admin.index'))
    return render_template('admin_login.html',form=form)

每当我运行需要登录的路由时，都会收到错误消息 TypeError:“NoneType”对象不可调用。这是回溯。在

Traceback (most recent call last):
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_debugtoolbar/__init__.py", line 125, in dispatch_request
    return view_func(**req.view_args)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 756, in decorated_view
    elif not current_user.is_authenticated():
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/werkzeug/local.py", line 338, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/werkzeug/local.py", line 297, in _get_current_object
    return self.__local()
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 46, in <lambda>
    current_user = LocalProxy(lambda: _get_user())
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 794, in _get_user
    current_app.login_manager._load_user()
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 363, in _load_user
    return self.reload_user()
  File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 325, in reload_user
    user = self.user_callback(user_id)
TypeError: 'NoneType' object is not callable

Answer 1

您应该在实例化登录管理器的同一个地方定义方法。在

阿拉巴马州

login = LoginManager
@login.user_loader
def load_user(id/email):
    #your logic here

或者从模块导入loginmanager实例并在视图中定义。在

Answer 2

编辑： 我为您的代码创建了一个最小的示例，区别在于我删除了get_id(self)函数（+一些不需要的额外库），因为它是您继承的UserMixin类的一部分。在

你确定你的表格正在被验证吗？你能描述一下你是如何一步一步地测试这个的吗？我是说，“去登录.html“->；“输入凭据”->；等

确定是哪个调用导致了崩溃，是不是登录函数中的redirect？在