烧瓶可以登录，但是当重定向到login_required装饰url时，它失败了

Question

我已经定义了一个从UserMixin继承的用户类

class User(UserMixin):
    ID = 1

    def __init__(self, username, password, email, role):
        self.id = User.ID
        self.username = username
        self.password = password
        self.email = email
        self.role = role
        User.ID += 1

    def __repr__(self):
        return '<User %r>' % self.username

    def verify_password(self, raw_password):
        return check_password_hash(self.password, raw_password)

class AdminSet(object):
    admin1 = User(username='admin1', password=generate_password_hash('admin1', method='pbkdf2:sha1', salt_length=5),
                  email='admin1@admin.com', role=0)
    admin2 = User(username='admin2', password=generate_password_hash('admin2', method='pbkdf2:sha1', salt_length=5),
                  email='admin2@admin.com', role=1)
    admin_list = [admin1, admin2]

    @classmethod
    def add(cls, user):
        cls.admin_list.append(user)

    @classmethod
    def commit(cls, **kwargs):
        admin = User(**kwargs)
        cls.admin_list.append(admin)

    @classmethod
    def delete(cls, user_id):
        pass

    @classmethod
    def searchID(cls, id):
        for admin in cls.admin_list:
            if admin.id == id:
                return admin
        return None

    @classmethod
    def queryFirst(cls, username):
        for admin in cls.admin_list:
            if admin.username == username:
                return admin
        return None

这是我的登录网址和main.index

@auth.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        print('password:', form.password.data)
        # try:
        user = AdminSet.queryFirst(form.username.data)
        if user.verify_password(form.password.data):
            print("same")
            login_user(user)
            print(current_user)
            return redirect(url_for('main.index'))
        else:
            print("different")
            flash('wrong')
        # except:
        #     print("exception")
        #     flash('用户名或密码错误')
    return render_template('auth/login.html', form=form)

@main.route('/index', methods=['GET'])
@login_required
def index():
    return render_template('main/index.html')

当我登录时，我从控制台得到的信息如下：

127.0.0.1 - - [16/May/2022 00:37:10] "POST /login?next=%2F HTTP/1.1" 302 -
same
<User 'admin1'>
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/login/styles.css HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/login/demo.css HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/login/loaders.css HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/js/login/jquery.min.js HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/js/login/jquery-ui.min.js HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/layui/layui.js HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/js/login/stopExecutionOnTimeout.js?t=1 HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:10] "GET /static/js/login/Particleground.js HTTP/1.1" 304 -
127.0.0.1 - - [16/May/2022 00:37:11] "GET /index HTTP/1.1" 302 -

您可以看到用户已成功加载和打印，并执行代码return redirect(url_for('main.index'))。

然后，页面再次被重定向到auth.login。

我没有选择数据库是出于某种原因，我不知道我的代码是否有问题，我使用调试器来检查login_user()函数，但是我没有得到任何有用的信息。

Answer 1

问题是user_loader回拨时出错了

这是最初的版本

@login_manager.user_loader
def load_user(user_id):
    return AdminSet.searchID(user_id)

在user_id上做一个小小的改动

@login_manager.user_loader
def load_user(user_id):
    return AdminSet.searchID(int(user_id))

很好用！