In wordpress how can I make sure a user only sees his own posts?

I have added a few custom roles to my blog. They work fine and the capabilities are as I have s开发者_开发问答pecified. The thing is that every user has a list of 'all' the posts in his posts window. He can only edit his own posts but does see posts written by other users.

How can I add a restriction to the role (or any different way) to make sure a user only sees his own posts?

Try pasting this into your functions.php file. Anywhere, likely at the bottom away from other functions. This should restrict user's from seeing posts that don't belong to them.

I hope this works for you! :)

function posts_for_current_author($query) {
    global $pagenow;

    if( 'edit.php' != $pagenow || !$query->is_admin )
        return $query;

    if( !current_user_can( 'manage_options' ) ) {
        global $user_ID;
        $query->set('author', $user_ID );
    }
    return $query;
}
add_filter('pre_get_posts', 'posts_for_current_author');