Reply To: Custom Fields on post Preview

• Jann

• November 4, 2021 at 12:55 pm

Addition (can’t edit):

If you’re using ACF Blocks, you’ll need this snippet

function fix_post_id_on_preview($null, $post_id) {
    if ( is_preview() && $post_id !== 'options' && substr( $null, 0, 6 ) != 'block_' ) {
        return get_the_ID();
    }
    else {
        $acf_post_id = isset($post_id->ID) ? $post_id->ID : $post_id;

        if (!empty($acf_post_id)) {
            return $acf_post_id;
        }
        else {
            return $null;
        }
    }
}
add_filter( 'acf/pre_load_post_id', 'fix_post_id_on_preview', 10, 2 );