Is post_id a moving target?

  • Resolved edhogan

    (@edhogan)


    16 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?

Viewing 4 replies - 1 through 4 (of 4 total)
  • Thread Starter edhogan

    (@edhogan)

    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?

    Thread Starter edhogan

    (@edhogan)

    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 */
  ...

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

    danleroux

    (@danleroux)

    or you can do this:

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

Viewing 4 replies - 1 through 4 (of 4 total)
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