Users get acces to all posts when they placed one

I’am still trying to make a system that gives users acces to edit their
own posts.

I build furtjer from the 32 of the rails recipe book called autorizing
users with roles.
So i create no a piece of code that does something but not the right
It’s only a test flash notice i don’t know wich code i must use

def check_priviliges

    user = @session['user']
    unless user.adverts.detect{|advert|
    flash[:notice] = "right account i must find a way to give users

to edit theri post"}
flash[:notice] = “wrong accont”
redirect_to :controller => “account”, :action => “login”
return false

This does nothing at the moment but the problem is when a user clicks on
edit he always get the first flash notice when he has at least one post.

Maybe it sound a little bit stupid, so i have very little experience
with programming. Ruby on Rails is my first language.
I must always find a way to tell the program what it must do when
user.adverts.detect{|advert| is correct.

Maybe i must find the solotion elsewhere than in recipe 32. In this week
i get a solotion from soemone but that was for another user system i

ror this i have a table adverts_users in the database that works well it
gets the right rows at eac post.

I’m not sure what those adverts are [or what happened to the end of that
Enumerable#detect block] but if you’ve got your Post belonging_to User
your User having_many Posts, then you should just check if that post’s
is the current user. Sound good?