Flask Login @login_required Not Working

I'm using flask-login to make sure users are logged in before they can access certain pages. I'm using @login_required on the view I want to protect, but even though I'm setting lo

Solution 1:

My problem was that the @flask_login.login_required decorator was above the @app.route('<path>') decorator, so I just replaced them and it worked

From this:

@flask_login.login_required
@app.route('/')
def index():
    return render_template("index.html")

to this:

@app.route('/')
@flask_login.login_required
def index():
    return render_template("index.html")

Solution 2:

Just spent the last 2 hours trying to fix this and realized that it was because off the configuration that the login_required was not working

On my local development environment, I had set

app.config['TESTING'] = True

From the flask-login documentation

If the application configuration variable LOGIN_DISABLED or TESTING is set to True, the login_required decorator will be ignored

set it back to this and got it working

app.config['TESTING'] = False

Solution 3:

Is the username field a primary key? Assuming that you are using sql alchemy, the get() method aways look for the primary key and does not accept expressions, see http://docs.sqlalchemy.org/en/rel_1_0/orm/query.html#sqlalchemy.orm.query.Query.get

Try again with user = models.User.filter_by(username=response['username'])...

Solution 4:

Just check if the user is logged in. There might be a cookie that the user is logged in. I tested if it was all working by just setting the user as logged in that added a cookie.
I just added this and got it working

@app.before_first_request
def init_app():
    logout_user()

and it worked perfectly fine

Solution 5:

If you are using flask-login, you need to make sure that you have a function that can be used by the library to load a user based on the ID. Something of this type:

@login_manager.user_loader
def load_user(user_id):
    return models.User.get(models.User.id == user_id)

Please read this section of the docs for how to do it.