我是 Web 开发新手，我正在使用 Flask 来构建我的 Web。当我运行 app.py 并导航到登录页面时，它一直显示“不允许使用方法”。我不确定我在哪里做错了。请帮忙。谢谢你。
这是我的应用程序.py
from flask import Flask,render_template,url_for,redirect,session,request
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
app = Flask(__name__)
# Configure SQL Alchemy
app.config['SECRET_KEY'] = 'your_secret_key'
app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///users.db"
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
db = SQLAlchemy(app)
# Database model
class Users(db.Model):
id = db.Column(db.Integer,primary_key=True)
username = db.Column(db.String(25),unique=True,nullable=False)
password = db.Column(db.String(125),nullable=False)
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)
# Routes
# Home
@app.route("/")
def index():
if "username" in session:
return redirect (url_for('home'))
return render_template ('home.html')
# Login
@app.route("/login",methods=["GET","POST"])
def login():
if request.method == 'POST':
username = request.form["Username"]
password = request.form["Password"]
check_user = Users.query.filter_by(username=username).first()
if check_user and check_user.check_password(password):
session["username"] = username
return redirect(url_for("dashboard"))
else:
return render_template ('login.html')
@app.route('/signup')
def signup():
return render_template('signup.html')
if __name__ == '__main__':
with app.app_context():
db.create_all()
app.run(debug=True)
这是我的login.html
<!DOCTYPE html>
<html>
<head>
<title>Login</title>
</head>
<body>
<h2>Login</h2>
<form action="/login" method="post" >
<input type="text" name="Username" placeholder="Username" required>
<input type="password" name="Password" placeholder="Password" required>
<button type="submit">Login</button>
</form>
<p>Don't have an account? <a href="{{ url_for('signup') }}">Sign up</a></p>
</body>
</html>
我尝试了很多方法，遵循youtube上的一些结构。没有任何变化。同样的错误。
由于您没有包含错误的回溯，因此很难得出问题的原因。 我确实注意到您没有考虑
GETlogin我建议尝试这个修改后的代码版本：
@app.route("/login", methods=["GET", "POST"])
def login():
if request.method == 'POST':
username = request.form["Username"]
password = request.form["Password"]
check_user = Users.query.filter_by(username=username).first()
if check_user and check_user.check_password(password):
session["username"] = username
return redirect(url_for("dashboard"))
else:
return render_template('login.html', error="Invalid username or password")
else:
# If the request method is GET, just render the login page
return render_template('login.html')