Accessing Flask Session variables from Flask Navigation for dynamic navigation menu

Question

I want to have a dynamic navigation menu that shows \"Login\" if the user is not currently logged on, and \"Logout\" if the user is logged in.

I\'m using code simila

Answer 1

Flask-Login will make your life easier. It provided a current_user to point to the current user, and the user object has an is_authenticated property:

from flask_login import current_user
...
@nav.navigation()
def top_nav():
    ...
    if current_user.is_authenticated: 
        items.append(View("Logout", ".logout")) 
    else: 
        items.append(View("Login", ".login"))

The code to initialize Flask-Login will like this:

from flask import Flask
from flask_login import LoginManager, UserMixin

app = Flask(__name__)
login_manager = LoginManager(app)

# The user model
class User(db.Model, UserMixin):
    ...


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

Check the documentation for more detail.