If you're running a blog or a magazine & a number of authors are working for you & writing for your blog on a daily basis. You'd probably want the current author to view their posts only in the dashboard. Which by default is not built-in the WordPress. Each author can view the posts of other authors (obviously they can't edit it) but for a large-scale blog or a magazine, this might create a mess in the author's dashboard.
To prevent this issue, just place the following snippet into your theme's function.php & see the magic for yourself.
function posts_for_current_author($query) { global $pagenow; if( 'edit.php' != $pagenow || !$query->is_admin ) return $query; if( !current_user_can( 'edit_others_posts' ) ) { global $user_ID; $query->set('author', $user_ID ); } return $query; } add_filter('pre_get_posts', 'posts_for_current_author');
What this piece of code does?
If you see here, we're using pre_get_posts hook, which runs before the actual query is run. We're checking whether the current_user_can() has the capability of edit other posts & set the query accordingly. Simple enough? eh?
Try it yourself & let us know if you get stuck somewhere in between.