-1

I'm using the save_post action to save some meta data in a custom post type:

function my_save_post($post_id) {
    // is autosave?
    if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
        return $post_id;
    }

    // verify nonce
    if ( !wp_verify_nonce( $_POST['metabox_nonce'], basename(__FILE__) )) {
        return $post_id;
    }

    if ('book' == $_POST['post_type']) {
        $post_parent = intval($_POST['post_parent']);
        $author = $_POST['author'];
        $price = intval($_POST['price']);
        update_post_meta($post_id, 'author', $author);
        update_post_meta($post_id, 'price', $price);

        //TODO: add function to update the post_parent field
    }
}

My question is, how can I modify the custom post type's post_parent field? As I understand, I can't use the update_post_meta() function because the post_parent field is not a meta field. Am I right?

Any help would be appreciated

1

You could use the wp_insert_post_data filter instead, which gives you direct access to the post's data.

function wpa_insert_post( $data , $postarr ){ 
    //do something with $data['post_parent']
    return $data;
}
add_filter( 'wp_insert_post_data' , 'wpa_insert_post' , '99', 2 );

UPDATE:

I added the following to your code and it's working:

function wpa_insert_post( $data , $postarr ){ 
    //do something with $data['post_parent']
    $data['post_parent'] = intval($postarr['post_parent']);

    //update meta data
    update_post_meta($postarr['ID'], 'author', $postarr['author']);
    update_post_meta($postarr['ID'], 'price', $postarr['price']);

    return $data;
}
add_filter( 'wp_insert_post_data' , 'wpa_insert_post' , '99', 2 );
  • And how can I save the metadata using this filter? – leemon May 29 '13 at 19:41
  • @user1991185 sorry, just getting back to this- it seems you've figured it out, yes? – Milo May 29 '13 at 22:12
0

A very simple and quick solution could be something like:

$wpdb->query( 'update '.$wpdb->prefix.'posts set post_parent='.$post_parent.' where ID='.$post_id );

and you might need to add the global $wpdb;

If you are not using the update at the save_post hook (like if you are updating the metaboxes of your custom post type), you could, instead, use:

  $bookUpdate = array();
  $bookUpdate['ID'] = $post_id;
  $bookUpdate['post_parent'] = $post_parent;

  wp_update_post( $bookUpdate );

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.