AttributeError: 'list' object 没有属性 'is_active'

Question

I am building a website using Flask and when I try to log in and signup I get this error AttributeError: 'list' object has no attribute 'is_active'

an error like this appears when I have used login_user in the flask_login library

here I use firestore database

I have tried various solutions on StackOverflow but none of them worked, I'm very confused now this is my code

__ini__.py

from flask import Flask
from flask_login import UserMixin
from flask_login import LoginManager
import firebase_admin
from firebase_admin import credentials
from firebase_admin import firestore

def create_app():
    app = Flask(__name__)
    app.config['SECRET_KEY'] = 'adjadlkahd'
    
    db = connect_database()

    from .views import views
    from .auth import auth
    from .models import User
    #check user login
    login_manager = LoginManager()
    login_manager.login_view = 'auth.login'
    login_manager.init_app(app)
    #create user model
    @login_manager.user_loader
    def load_user(id):
        return User.get_user_id(id)
    #register blueprints
    app.register_blueprint(views, url_prefix='/')
    app.register_blueprint(auth, url_prefix='/')
    
 
    return app

cred = credentials.Certificate("websites\serviceAccountKey.json")
firebase_admin.initialize_app(cred)

def connect_database():
    db = firestore.client()
    return db

auth.py

from flask import Blueprint, render_template, request, redirect, url_for
from .models import User
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import login_user, login_required, logout_user, current_user

auth = Blueprint('auth', __name__)

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

        user = User.log_in(email)
        if user:
            if check_password_hash(user[0].to_dict()['password'], password):
                login_user(user, remember=True)
                redirect(url_for('views.home'))
            else:
                return "<h1>paass salah</h1>"
        else:
            return "<h1>user tidak ada</h1>"
 
    return render_template('login.html')

@auth.route('/logout')     
@login_required 
def logout():
    logout_user()
    return redirect(url_for('auth.login'))

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

        if User.check_user(email):
            return "<h1>email already exist</h1>"

        new_user = User(username=username, email=email,
                        password=generate_password_hash(password)).create_user()

        login_user(new_user, remember=True)

        return redirect(url_for('views.home'))

    return render_template('signup.html')

models.py

from flask_login import UserMixin
from . import connect_database
import uuid

db = connect_database()
class User(UserMixin):
    def __init__(self, username, email, password):
        self.username = username
        self.email = email
        self.password = password

    def create_user(self):
        db.collection('user').document(self.username).set({
            'id' : str(uuid.uuid4()),
            'username': self.username,
            'email': self.email,
            'password': self.password
        })

    def log_in(email):
        user = db.collection('user').where('email', '==', email).get()
        return user
    def check_user(email):
        user = db.collection('user').where('email', '==', email).get()
        return bool(user)
    
    def get_user_id(id):
        return db.collection('user').document(id).get()

views.py

from flask import Blueprint
from flask_login import login_required, current_user
views = Blueprint('views', __name__)

@views.route('/')
@login_required
def home():
    return "<h1>logged in</h1>"

Answer 1

For flask login to work you need to have a user class that implements some properties and methods. When you use login_user method the argument should be an instance of that user class.

make user that your method def log_in(email) returns a user object not a list.

def log_in(email):
    user = db.collection('user').where('email', '==', email).get()
    return user  # <-- most probably is a list.

1. Read the items form the user collection
2. Create an instance of the user class
3. fill the properties of the user class from the collection
4. return the instance