Attachment Parent

Bumping this topic up because I just encountered the same thing in WP 2.2.1.

I have some code that takes a post, looks to see if it has children of type ‘attachment’ and then does stuff with it. This means that the post_parent relationship between an uploaded file and the post it was uploaded to is very important to the success of my code.

However, I have noticed that I can successfully ‘attach’ a file to a post by uploading it. However, if I go back to that file (in the Browse tab of the parent post) and edit its Title or Description, suddenly the connection between the attachment and the parent post is gone. I checked the database and the post_parent field for the attachment post is set to 0 instead of the correct post_parent id.

So it seems that the initial upload correctly sets the post_parent for the attachment post, but any subsequent changes breaks it. Can we have a fix in the next patch?

As for temporary solutions, I’m considering using a Hook/Filter approach if possible.

I have a solution that seems to work fine for this. I haven’t tested it too heavily.

in wp-includes/post.php
look for function wp_update_post
on line 747 (for me, wp v. 2.2.1) you’ll see this:

if ($postarr[‘post_type’] == ‘attachment’)
return wp_insert_attachment($postarr);

change to this:

if ($postarr[‘post_type’] == ‘attachment’)
return wp_insert_attachment($postarr, false, $post[‘post_parent’]);

hope this helps!