Save the_content into custom field

Question

Is it possible to save the content (inside the WP WYSIWYG (the_content)) into a custom field?

This is what I have so far:

add_action('edit_post', 'save_content_to_field');
function save_content_to_field($post_ID) {
    global $wpdb;

    if(!wp_is_post_revision($post_ID)) {
        $content = get_the_content($post_ID);
        add_post_meta($post_ID, 'desc', $content, true);
    }
}

Answer 1

You can get the content with $_REQUEST, Try the below code:

add_action('publish_post', 'save_content_to_field');
function save_content_to_field($post_ID) {
    if(isset($_REQUEST['content'])) {
        update_post_meta($post_ID, 'desc', $_REQUEST['content']);
    }
}

UPDATED With the below code if you want to sore with shortcode support:

add_action('publish_post', 'save_content_to_field');
function save_content_to_field($post_ID) {
    $post = get_post($post_ID);
    $result = apply_filters('the_content',$post->post_content);

    if($result) {
        update_post_meta($post_ID, 'desc', $result);
    }
}

Answer 2

OK!

I found this way and this might be useful to someone:

add_action('edit_post', 'save_content_to_field');
function save_content_to_field($post_ID) {
    global $wpdb;

    if(!wp_is_post_revision($post_ID)) {
        //$content = get_the_content($post_ID);
        global $post;
        $content = apply_filters('the_content', $post->post_content);

        add_post_meta($post_ID, 'desc', $content, true);
       }
     }