我正在尝试仅在创建帖子时自动填充自定义字段，而不是在更新帖子时自动填充。

CPT“；valoraciones“；ACF自定义字段“；ID\\u valoraciones；。

ID\\u valoraciones是一个递增的数字。也就是说，对于post 1，ID\\u valoraciones:1，post 2，ID\\u valoraciones:2等等。。。

到目前为止，我采取了以下行动：

           function auto_assign_ids( $post_id, $post, $update ) {

        // Only assign ID to new approved "valoraciones" posts
        if ( $post->post_status == \'publish\' && $post->post_type == \'valoraciones\' ) {
       
            // get the most recent "valoraciones" posts
            $valoracion_args = array(
                \'numberposts\'       =>   2,
                \'post_type\'         =>   \'valoraciones\',
                \'orderby\'           =>   \'post_date\',
                \'order\'             =>   \'DESC\'
            );
            $valoraciones = get_posts( $valoracion_args );
       
            // get the id_valoraciones of the prior post
            $last_id = get_post_meta( $valoraciones[1]->ID, \'id_valoraciones\', true );
       
            // increment
            if ( !$last_id ) {
                $last_id = 0;
            }       
             $last_id++;
            
                // unhook this function so it doesn\'t loop infinitely
                remove_action( \'save_post\', \'auto_assign_ids\', 10, 3 );
                // set the id_valoraciones of the current post
                update_post_meta( $post_id, \'id_valoraciones\', $last_id );
                // re-hook this function
                add_action( \'save_post\', \'auto_assign_ids\', 10, 3 );
        }
        
 
}
add_action( \'save_post\', \'auto_assign_ids\', 10, 3 );

每次我更新帖子时，它都会修改；id\\u valoraciones“；，是否有任何方法使其在创建后不会修改该值？

<?php
function auto_assign_ids( $post_id, $post, $update ) {

    // Only assign ID to new approved "valoraciones" posts
    if ( $post->post_status == \'publish\' && $post->post_type == \'valoraciones\' ) {
                
        $id_valoraciones = get_post_meta( $post_id, \'id_valoraciones\', true );
        
        if( ! $id_valoraciones ) {
            
            // get the most recent "valoraciones" posts
            $valoracion_args = array(
            \'numberposts\'       =>   2,
            \'post_type\'         =>   \'valoraciones\',
            \'orderby\'           =>   \'post_date\',
            \'order\'             =>   \'DESC\'
            );
            $valoraciones = get_posts( $valoracion_args );

            // get the id_valoraciones of the prior post
            $last_id = get_post_meta( $valoraciones[1]->ID, \'id_valoraciones\', true );

            // increment
            if ( !$last_id ) {
                $last_id = 0;
            }       
            
            $last_id++;
            
            update_post_meta( $post_id, \'id_valoraciones\', $last_id );
            
        } else {
            
            // id_valoraciones was set before
            
        }
        
    }
}
add_action( \'save_post\', \'auto_assign_ids\', 100, 3 );