python - 只需在 flask 中登录系统并出现 "Method Not Allowed"错误

Question

我正在尝试用 Flask 做一个简单的登录系统。我发现很多教程都对其进行了测试，然后尝试自己做一些事情。我在 Heroku 上运行我的应用程序并使用 postgresql 数据库。我有一些问题，但我不知道为什么？在数据库中有一个用户，当我输入登录名和密码然后提交时，出现如下错误:

Method Not Allowed

The method is not allowed for the requested URL.

这是带有登录表单的 index.html 片段:

<form class="form-signin" action="" method="post" name="login">
        <h2 class="form-signin-heading">Please sign in</h2>
        <label for="inputEmail" class="sr-only">Email address</label>
        <input type="email" name="inputEmail" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
        <label for="inputPassword" class="sr-only">Password</label>
        <input type="password" id="inputPassword" class="form-control" placeholder="Password" required>

        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
      </form>

运行.py

import os
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.login import LoginManager, login_required
from flask import Flask,session, request, flash, url_for, redirect, render_template, abort, Blueprint
from flask.ext.login import login_user , logout_user , current_user , login_required
import views

app = Flask(__name__, template_folder='templates')

#config for Forms
app.config.update(DEBUG = True, SECRET_KEY = 'csefdfdf')

#import aplication views
app.register_blueprint(views.devops)

#conection to database
app.config['SQLALCHEMY_DATABASE_URI'] = os.environ['DATABASE_URL']
db = SQLAlchemy(app)

#flask-login
login_manager = LoginManager()
login_manager.init_app(app)

login_manager.login_view = 'index'

@login_manager.user_loader
def load_user(id):
    return User.query.get(int(id))

@app.route('/')
@app.route('/index', methods=['GET', 'POST'])
def index():
    if request.method == 'GET':
        return render_template('index.html', title='DevOps Nokia')
    email = request.form['inputEmail']
    password = request.form['inputPassword']
    admin = models.User.query.fillter_by(email=email, password=password).first()
    if admin is None or admin.is_admin == False:
        flash('Error, no user!')
        return redirect(url_for('index'))
    login_user(admin)
    flash('Logged in successfully')
    return redirect(request.args.get('next') or url_for('test'))

def run():
    app.run(debug=True)

有人知道如何解决这个问题吗？ 等待你的答案。 :)

Answer 1

您需要确保该函数的两个路由定义都定义了允许的方法:

@app.route('/', methods=['GET', 'POST'])
@app.route('/index', methods=['GET', 'POST'])

至于400 Bad Request错误 - 我相信你得到这个是因为你正在尝试访问 request.form['inputPassword'] , 但您的表单中没有带 name 的输入字段inputPassword 的属性.您需要添加 name属性如下:

<input type="password" name="inputPassword" id="inputPassword" class="form-control" placeholder="Password" required>

此外，fillter 的使用似乎是一个错字:

admin = models.User.query.fillter_by(email=email, password=password).first()

应该是:

admin = models.User.query.filter_by(email=email, password=password).first()