WordPress：删除一个帖子后删除用户的所有帖子

Question

I'm using serveral Custom Post Types in WordPress. Every user can add a company profile as a specific post type called "company". If the user has a company profile he can add more content like jobs, events and more. All defined as specific Custom Post Types.

It is also possible that the user deletes his own company profile. If he do so, all other posts from the user should be deleted as well (except normal posts) and the URL should be redirected (301) to the homepage.

I've found the action "delete_post" in the WP docs (https://codex.wordpress.org/Plugin_API/Action_Reference/delete_post). But I'm not sure how to fire it.

Does anyone has an hint?

EDIT: See my answer below

Answer 1

I found the solution. The problem was the action 'delete_post'. I've changed it to 'trash_to_publish' based on the Post Status Transitions: https://codex.wordpress.org/Post_Status_Transitions

Now everything works fine.

/**
 * Deletes all posts from author of company profile.
 */
function delete_all_posts_from_author($post_id) {


    global $post;
    $id = $post->ID;

    // Only trigger if post type is "company"
    if ( get_post_type($id) == "company" ) {

        $author_id = $post->post_author;

        $posts_from_author = get_posts(
            array(
                'posts_per_page'    => -1,
                'post_status'       => 'publish',
                'post_type'         => array('event','job'),
                'author'            => $author_id,
                'fields'            => 'ids', // Only get post ID's
            )
        );

        foreach ( $posts_from_author as $post_from_author ) {
            wp_trash_post( $post_from_author, false); // Set to False if you want to send them to Trash.
        }
    }


}

add_action( 'publish_to_trash',  'delete_all_posts_from_author', 10, 1 );

As a bonus I could use the function to publish all posts from a user again if I untrash the company profile.

/**
 * Untrash posts if company profile is untrashed
 */
function untrash_all_posts_from_author($post_id) {


    global $post;
    $id = $post->ID;

    if ( get_post_type($id) == "company" ) {

        $author_id = $post->post_author;

        $posts_from_author = get_posts(
            array(
                'posts_per_page'    => -1,
                'post_status'       => 'trash',
                'post_type'         => array('event','job'),
                'author'            => $author_id,
                'fields'            => 'ids', // Only get post ID's
            )
        );

        foreach ( $posts_from_author as $post_from_author ) {
            wp_untrash_post( $post_from_author); // Set to False if you want to send them to Trash.
        }
    }


}

add_action( 'trash_to_publish',  'untrash_all_posts_from_author', 10, 1 );

Hope that helps. And please let me know if I've made a mistake.

EDIT: I've changed the argument wp_delete_post() to wp_trash_post() because wp_delete_post() only applies to native posts, pages, and attachments. Great answer from @rarst here: https://wordpress.stackexchange.com/questions/281877/error-after-deleting-custom-post-type-with-a-function-no-trash-used/281888#281888