烧瓶登录和Heroku的问题 [英] Flask-Login and Heroku issues

问题描述

我有一个示例web应用程序（烧瓶登录在heroku上运行）在这个URL： http：// twittaclone。 herokuapp.com 。

I have a sample web application (flask with flask-login running on heroku) at this URL: http://twittaclone.herokuapp.com.

当我在本地主机上运行它时，登录功能可以正常工作。当我推到heroku它吓倒了，不允许用户登录（它允许用户注册）。数据库修改正在进行中。

When I run it on my localhost the login functionality works fine. When I push to heroku it freaks out and does not allow users to login (it does allow user registration). Database modifications are being made.

为什么烧瓶登录不能在heroku上工作？

Why would flask login not work on heroku?

app = Flask(__name__)
mysql = MySQL()

app.config['MYSQL_DATABASE_HOST'] = os.environ['MYSQL_DATABASE_HOST'] if 'MYSQL_DATABASE_HOST' in os.environ else config.MYSQL_DATABASE_HOST
app.config['MYSQL_DATABASE_PORT'] = os.environ['MYSQL_DATABASE_PORT'] if 'MYSQL_DATABASE_PORT' in os.environ else config.MYSQL_DATABASE_PORT
app.config['MYSQL_DATABASE_USER'] = os.environ['MYSQL_DATABASE_USER'] if 'MYSQL_DATABASE_USER' in os.environ else config.MYSQL_DATABASE_USER
app.config['MYSQL_DATABASE_PASSWORD'] = os.environ['MYSQL_DATABASE_PASSWORD'] if 'MYSQL_DATABASE_PASSWORD' in os.environ else config.MYSQL_DATABASE_PASSWORD
app.config['MYSQL_DATABASE_DB'] = os.environ['MYSQL_DATABASE_DB'] if 'MYSQL_DATABASE_DB' in os.environ else config.MYSQL_DATABASE_DB

mysql.init_app(app)

if 'SECRET_KEY' in os.environ: app.config['SECRET_KEY'] = os.environ['SECRET_KEY']
else: app.config['SECRET_KEY'] = os.urandom(24)

def connect_db(): return mysql.connect()


###
# Routing for your application.
###

login_manager = LoginManager()
login_manager.login_view = "login"

@login_manager.user_loader
def load_user(username):
    g.db = connect_db()
    return get_user(username)

login_manager.init_app(app)

@app.route('/')
def home(): return render_template('home.html')

def connect_db(): return mysql.connect()

@app.before_request
def before_request():
    g.user = current_user
    g.db = connect_db()

@app.teardown_request
def tear_down(exception):
    g.db.close()

@app.route('/main/')
@login_required
def main():
    print("in main")
    tweets, user = get_main()
    follower_count, followee_count = get_follower_info(g.user.username)
    return render_template('main.html', user=user, tweets=tweets, followercount =      follower_count, followeecount = followee_count)


@app.route('/login/', methods=['GET', 'POST'])
def login():
    """Logs the user in."""
    if request.method == 'GET':
        if current_user is user_logged_in: logout_user()

    error = None
    if request.method == 'POST':
        user = get_user(request.form['username'])
        if user is None:
            error = 'Invalid username'
        elif not check_password_hash(user.password, request.form['password']):
            error = 'Invalid password'
        else:
            flash('You were logged in')
            login_user(user)
            return redirect(url_for('main'))

    return render_template('login.html', error=error)

推荐答案

我很确定Heroku使用PostgreSQL。尝试引用他们的文档 https://devcenter.heroku.com/articles/heroku-postgresql

I'm pretty sure that Heroku uses PostgreSQL. Try referring to their documents https://devcenter.heroku.com/articles/heroku-postgresql

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