Remove post with attachments hook

Question

So I have a link that removes a post.

I also have some code in my functions.php wich should be hooked to the wp_delete() function.

However. The function doesn't seem to work. What am I doing wrong?

<p><a href="<?php echo get_delete_post_link( get_the_ID()); ?>">Delete Papercraft</a></p>

Here is the function

function delete_post_children($post_id) {
global $wpdb;

$ids = $wpdb->get_col("SELECT ID FROM {$wpdb->posts} WHERE post_parent = $post_id AND post_type = 'attachment'");

foreach ( $ids as $id )
    wp_delete_attachment($id);
}
add_action('before_delete_post', 'delete_post_children');

Answer 1

I've found out why it doesn't work. My attachments were only added to the media library and weren't attached to the post.