flask框架基础
login_manager.login_view = 'login' # 指定登录页面的路由
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@login_manager.user_loader
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def load_user(user_id):
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return User.query.get(int(user_id))
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```
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login_manager.user_loader装饰器用于指定加载用户的函数，Flask-Login 会使用该函数来获取当前登录的用户。
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### 7.4 实现登录功能
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#### 7.4.1 登录表单
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```
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class LoginForm(FlaskForm):
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username = StringField('Username', validators=[DataRequired()])
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password = PasswordField('Password', validators=[DataRequired()])
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remember_me = BooleanField('Remember Me')
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submit = SubmitField('Sign In')
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```
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#### 7.4.2 登录视图函数
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```
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from flask_login import login_user, login_required, logout_user, current_user
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@app.route('/login', methods=['GET', 'POST'])
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def login():
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if current_user.is_authenticated:
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return redirect(url_for('index'))
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form = LoginForm()