I am looking to query and pull a list of all custom posts 'foo' that have no featured image set and/or have no text copy (from the WP editor). The list will be used to determine which posts need content and/or a featured image. (We're importing a huge database from an outside source).
I'm starting with this-
$result = new WP_Query( array( 'posts_per_page' => -1, 'meta_key' => '_thumbnail_id', 'post_type' => 'foo' ) );
How would I change this to 1) exclude any post with a featured images set [I realize as it is now it includes them] and 2) also exclude any post that has content in the post editor?