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1. edhogan
   Member
   Posted 3 years ago #

   I have a plugin with a that adds a save_post hook.

   I notice that if I click on "save post", I might see my save_post hook invoked with post_id=247 (for example), then if i modify the post by adding images, and then click on "save post" again, now my save_post hook is invoked with a different post_id=252, and invoked with post_id=247.

   How am I supposed which is the "real" post_id? Is there a way to determine that 252 was a synonym for 247?

2. edhogan
   Member
   Posted 3 years ago #

   I appears that the post_id that save_post is being invoked with is some sort of "revision" number that is related to the autosave. Any idea how i can go from a revision number to a post_id?

3. edhogan
   Member
   Posted 3 years ago #

   To close the loop...
   here is a way to get to the correct post_id inside of save_post. Things like autosave and a normal click on save will bump the revision number of the post. Then save_post is called with that number. To go from the revision number back to the actual post_id, use the SQL query:

   SELECT post_parent FROM " . $wpdb->posts . " WHERE ID = " . $post_id;

   function my_action__save_post($post_id, $post) {
     global $wpdb;
     /* autosave and other things appear to bump the post_id */
     $sql_get_real_post_id = "SELECT post_parent FROM " . $wpdb->posts . " WHERE ID = " . $post_id;
     $post_id_answer = $wpdb->get_results($sql_get_real_post_id);
     if ($post_id_answer[0]->post_parent != 0) {
       $post_id = $post_id_answer[0]->post_parent;
     }
     /* now $post_id is really correct */
     ...

4. Jenst
   Member
   Posted 2 years ago #

   Seems to be working great! Thanks for sharing the solution.

5. danleroux
   Member
   Posted 2 years ago #

   or you can do this:

   $post_id = get_post($post_id)->post_parent;

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