gothickmatt

Incidentally, for anyone still looking for this, the way I found to do it is to use wp_query’s tax_query object (a WP_Tax_Query) to generate SQL that you can then use against arbitrary objects, like Users.

I’m using the Query Multiple Taxonomies plugin to generate my taxonomy queries, but I think this should work with any taxonomy query. Example code from my taxonomy.php to grab all user_ids for users matching the current taxonomy query:

extract($wp_query->tax_query->get_sql( $wpdb->users, 'ID' ));
$user_ids = $wpdb->get_col( "SELECT $wpdb->users.ID FROM $wpdb->users $join WHERE 1=1 $where" );

At this point, you could, of course, grab anything you liked from the users table, etc., by altering this query, or, more clumsily, I suppose, just call get_userdata() or whatever on each of the user_ids you get back.

(This method was partly inspired by the tax_query snippet found here: http://wordpress.stackexchange.com/questions/16393/show-certain-terms-from-custom-taxonomy-but-exclude-parent-terms/16795#16795 )

Okay, I fixed mine like this. In auto-post-thumbnail.php, there’s a line in apt_generate_post_thumb:

$thumb_id = wp_insert_attachment($attachment, $file, $post_id);

I think this is causing the problem because $file doesn’t seem to be set at this point (or anywhere, in fact.) It’s wp_insert_attachment that sets up the _wp_attached_file. Changing this to:

$thumb_id = wp_insert_attachment($attachment, $new_file, $post_id);

…seems to fix it, though I needed to delete the broken images in the Media Library and then regenerate the thumbnails from the plugin admin page.

I haven’t had time to test that this is still generating the right sizes, etc. — it just looks like the _wp_attached_file has to be there for the attachment to be recognised as an image at all, which is what’s causing the fundamental problem.

Anyone else have time to test this?

Good question, Dan. I’ve run out of lunch hour, so I’ll have to check later. I’ve narrowed it down to get_the_post_thumbnail() returning empty for some of the posts when it’s called from my theme, but not for others; I’ll investigate further this evening, assuming nobody else has found the problem by then…

EDIT: Okay, looks like it’s the actual creation of the images in the media library that is the problem. If I clear and regenerate the thumbnails manually, I end up with broken images in the media library, i.e. there are entries for the thumbnails, but the images themselves appear blank.

Splendid! I found the lines a couple of lines later in the file (I’m running 2.3.2), but I just commented them out and now the problem’s gone. Thanks!

PS: @oseary, yes, like meetnet21 says, just remove them or disable them. I commented them out, but just plain deleting them will work.