问题描述
如果用户单击登录名,则在主页上为用户创建登录名,然后显示登录页面。如果电子邮件名和密码正确,则在其中输入电子邮件名和密码,然后将用户重定向到主页。现在在主页中,我将登录名替换为用户名并注销。为此,我在模板文件中使用current_user.is_authenticated
,如果为true,则显示用户名和注销,但在模板中始终为false,我不知道为什么。我有config.json,并且在那里定义了参数,所以不用担心。这是我的python代码。
local_server=True
app=Flask(__name__)
app.secret_key='supper-secret-key'
login_manager=LoginManager(app)
login_manager.session_protection="strong"
class Users(UserMixin,db.Model):
__tablename__='users'
user_id= db.Column(db.Integer,primary_key=True)
first_name = db.Column(db.String(80),nullable=False)
last_name = db.Column(db.String(80),nullable=False)
email = db.Column(db.String(20),primary_key=True,nullable=False)
password_hash = db.Column(db.String(80),nullable=False)
def is_active(self):
return True
def is_authenticated(self):
return self._authenticated
def is_anonymous(self):
return False
def is_admin(self):
return self.admin
def __repr__(self):
return f'<Users:{self.first_name}>'
def get_id(self):
return (self.user_id)
def set_password(self,password):
self.password_hash = generate_password_hash(password)
def check_password(self,password):
return check_password_hash(self.password_hash,password)
@login_manager.user_loader
def load_user(id):
try:
return db.session.query(Users).get(id)
except:
return None
@app.route("/")
def home():
return render_template("index.html",params=params)
@app.route("/login",methods=['POST','GET'])
def login_post():
print("before login",current_user.is_authenticated) #False
email=request.form.get('email')
password = request.form.get('password')
remember=True if request.form.get('remember') else False
user=Users.query.filter_by(email=email).first()
user.check_password(password)
if not user:
flash('Please check your login details and try again.','danger')
return redirect(url_for('login'))
login_user(user,remember=remember,force=True)
if current_user.is_authenticated:
print(current_user.first_name) # user name is properly printed
flash('Login Successful','success')
return redirect(url_for('home'))
@app.route("/register")
def register():
return render_template('register.html',params=params)
@app.route("/register",methods=['GET','POST'])
def register_post():
first_name = request.form.get('fname')
last_name = request.form.get('lname')
email = request.form.get('email')
password= request.form.get('password')
password2=request.form.get('cpassword')
if (password!=password2):
flash('Password must be same','danger')
return render_template('register.html',params=params)
users=Users.query.filter_by(email=email).first()
if users:
flash('Email address already exists','warning')
return redirect(url_for('register'))
new_user=Users(first_name=first_name,last_name=last_name,email=email)
new_user.set_password(password)
db.session.add(new_user)
db.session.commit()
return redirect(url_for('login'))
@app.route("/logout")
def logout():
logout_user()
flash('You were logged out','warning')
return redirect(url_for('home'))
{% if current_user.is_authenticated %} <!-- here current_user.is_authenticted is false -->
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown"
aria-haspopup="true" aria-expanded="false">
<img src="static/img/userlogo.png" width="30" height="30" class="rounded-circle" alt="">
hey {{ current_user.first_name }}
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Profile</a>
</li>
<li class="nav-item" style="padding-left: 8px;">
<a class="btn btn-sm btn-outline-dark" role="button" aria-pressed="true" href="/logout">logout</a>
</li>
{% else %}
<li class="nav-item" style="padding-left: 8px;">
<a class="btn btn-sm btn-outline-dark" role="button" aria-pressed="true" href="/login">Login</a>
</li>
{% endif %}
请帮助我解决此问题。 预先感谢。
解决方法
在文档中,您可以阅读:
要简化用户类的实现,可以从UserMixin继承,后者为所有这些属性和方法提供了默认实现。
您继承了von UserMixin
,因此您无需实现所有这些方法-也许这就是您的问题。
https://github.com/maxcountryman/flask-login/blob/main/docs/index.rst#your-user-class
例如我的(简化的)用户类如下所示:
class User(db.Model,UserMixin): # type: ignore
...
def __repr__(self) -> str:
return f'<User {self.email}>'
完全不需要身份验证助手!