Make better use of flask_principal about ctesi HOT 1 CLOSED

@app.route('/posts/<post_id>', methods=['PUT', 'PATCH'])
def edit_post(post_id):
    permission = EditBlogPostPermission(post_id)

    if permission.can():
        # Save the edits ...
        return render_template('edit_post.html')

    abort(403)  # HTTP Forbidden

@identity_loaded.connect_via(app)
def on_identity_loaded(sender, identity):
    # Set the identity user object
    identity.user = current_user

    # Add the UserNeed to the identity
    if hasattr(current_user, 'id'):
        identity.provides.add(UserNeed(current_user.id))

    # Assuming the User model has a list of roles, update the
    # identity with the roles that the user provides
    if hasattr(current_user, 'roles'):
        for role in current_user.roles:
            identity.provides.add(RoleNeed(role.name))

    # Assuming the User model has a list of posts the user
    # has authored, add the needs to the identity
    if hasattr(current_user, 'posts'):
        for post in current_user.posts:
            identity.provides.add(EditBlogPostNeed(unicode(post.id)))