Bug: "User undefined" when previous user hasn't logged out

[lingering126]

I found that if the previous user hasn't logged out, run the flask app again and there will be a "user undefined" bug.

[lingering126]

I added this routes, and the bug fixed:

@pr.before_request
def before_request():
    g.user = current_user if current_user.is_authenticated else None

this code sets g.user to the currently logged-in user (if there is one) before each request, making the current_user object available globally throughout the request.