How to restrict the editors from viewing/editing pages created by admin?

Question

In the backend, how can I restrict the editors (user with editor role) from viewing/editing pages created by admin (and/or by administrator role)?

I know that the editor role in WordPress have "edit_others_pages" capability, but I need a function for a custom capability like: "edit_others_pages_except_admin" :)

I don't want to use a huge/complicated plugin just for that!

Thanks! I searched for a solution more then 1h :D

Answer 1

This code will do the job...

<?php
add_action('pre_get_posts', 'filter_posts_list');
function filter_posts_list($query)
{
    //$pagenow holds the name of the current page being viewed, we want to run our code only on edit.php (posts list)
    global $pagenow;

    //If the 'Editor' is logged in, exclude 'Admin's posts
    if(current_user_can('editor') && ('edit.php' == $pagenow))
    {
        //global $query's set() method for excluding admin's posts
        $query->set('author', '-1');
    }
}

For a detailed explanation Read Here.