how do I redirect to the flask blueprint parent?

Question

Suppose i have the following structure:

/root/user/login

I do the login in a blueprint:

  app.register_blueprint(login_blueprint,url_prefix=prefix('/user'))

I can redirect to ".index":

@login_blueprint.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        #### this redirects me to '/root/user/'
        redirect_to_index= redirect(url_for('.index'))
        response = current_app.make_response(redirect_to_index)
        # do the log in
     return response

    redirect_to_index=redirect(url_for('.index'))

    response = current_app.make_response(redirect_to_index)

The redirect brings me to /root/user:

redirect(url_for('.index'))

But how to get to /root (which is up relative to the current url (..)?

Answer 1

You can pass url_for the name of the endpoint function for /root/.

For example, if you have:

@app.route('/root/')
def rootindex():
    return "this is the index for the whole site."

elsewhere in your app, you can do:

redirect(url_for('rootindex'))

To cause a redirect here. When you put a . in front of the string you pass to url_for, that tells it to look for an endpoint in the current blueprint. By leaving the . off, you tell it to look for a endpoint in the app