Flash Messages don't work while logging in.

[niko-09]

from flask import Blueprint, render_template, request, flash, redirect, url_for
from .models import User
from werkzeug.security import generate_password_hash, check_password_hash
from . import db

auth = Blueprint('auth', __name__) # initialize flask blueprint

@auth.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        email = request.form.get('email')
        password = request.form.get('password')

        user = User.query.filter_by(email=email).first()
        if user:
            if check_password_hash(user.password, password):
                flash('Logged in successfully!', category='success')
                return redirect(url_for('views.home'))
            else:
                flash('Incorrect password, try again.', category='error')
        else:
            flash('Email does not exist.', category='error')

    return render_template("login.html",)

@auth.route('/logout')
def logout():
    return "<p>Logout</p>"

@auth.route('/sign-up', methods=['GET', 'POST'])
def sign_up():
    if request.method == 'POST':
        email = request.form.get('email')
        first_name = request.form.get('firstName')
        password1 = request.form.get('password1')
        password2 = request.form.get('password2')

        user = User.query.filter_by(email=email).first()
        if user:  # check if user exists
            flash('Email already exists.', category='error')
            print("yes")
        elif len(email) < 4:
            flash('Email must be greater than 3 characters.', category='error')
        elif len(first_name) < 2:
            flash('First name must be greater than 1 character.', category='error')
        elif password1 != password2:
            flash('Passwords don\'t match.', category='error')
        elif len(password1) < 7:
            flash('Password must be at least 7 characters.', category='error')
        else:  # if user does not exist, create new user
            new_user = User(email=email, first_name = first_name, password=generate_password_hash(password1, method='sha256'))
            db.session.add(new_user)
            db.session.commit()
            flash('Account created!', category='success')
            return redirect(url_for('views.home'))

    return render_template("sign_up.html")rd = request.form.get('password')

        user = User.query.filter_by(email=email).first()
        if user:
            if check_password_hash(user.password, password):
                flash('Logged in successfully!', category='success')
                return redirect(url_for('views.home'))
            else:
                flash('Incorrect password, try again.', category='error')
        else:
            flash('Email does not exist.', category='error')

    return render_template("login.html",)

@auth.route('/logout')
def logout():
    return "<p>Logout</p>"

@auth.route('/sign-up', methods=['GET', 'POST'])
def sign_up():
    if request.method == 'POST':
        email = request.form.get('email')
        first_name = request.form.get('firstName')
        password1 = request.form.get('password1')
        password2 = request.form.get('password2')

        user = User.query.filter_by(email=email).first()
        if user:  # check if user exists
            flash('Email already exists.', category='error')
            print("yes")
        elif len(email) < 4:
            flash('Email must be greater than 3 characters.', category='error')
        elif len(first_name) < 2:
            flash('First name must be greater than 1 character.', category='error')
        elif password1 != password2:
            flash('Passwords don\'t match.', category='error')
        elif len(password1) < 7:
            flash('Password must be at least 7 characters.', category='error')
        else:  # if user does not exist, create new user
            new_user = User(email=email, first_name = first_name, password=generate_password_hash(password1, method='sha256'))
            db.session.add(new_user)
            db.session.commit()
            flash('Account created!', category='success')
            return redirect(url_for('views.home'))

    return render_template("sign_up.html")

Here's my auth.py file. Whenever I try logging in with (valid or invalid credentials), no messages get flashed. These work fine while signing up in /sign-up

[Chase5000]

I had a similar issue. When logging in it said it didn't recognize the email. Not sure if this will help but will post anyway. Someone in the youtube comments fixed my issue. The final form of create_app in init.py should be written as followed:

def create_app(): app = Flask(name) app.config['SECRET_KEY'] = 'qwertyuiop' app.config['SQLALCHEMY_DATABASE_URI'] = f'sqlite:///{DB_NAME}' db.init_app(app)

from .views import views
from .auth import auth

app.register_blueprint(views, url_prefix='/')
app.register_blueprint(auth, url_prefix='/')

from .models import User, Note

create_database(app)

login_manager = LoginManager()
login_manager.login_view = 'auth.login'
login_manager.init_app(app)

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

return app

(notice that the login manager changed)

Also delete database.db in the instance folder before running flask

[niko-09]

Issue is resolved, I didn't mention <form method = 'POST'> in login.html