Cancan嵌套资源限制访问索引。

I am currently using cancan in my web app and so far it works greats but there is a problem I am having regarding nested resources in rails. When accessing the index page cancan does not restrict a user from seeing what another logged in user can see. It works fine for the show pages but when visiting the index page it does not work.I am currently using cancan in my web app and s