Reply To: Setting the post Featured Image based on (PDF) File upload field thumbnail

• Uli Linn

• March 15, 2022 at 3:45 am

Hi Damiane,

i already did exchange every “publication” with “downloadcenter”, wich is the name of my category, but had file URL as type. Now i changed it to “File Array”, but still nothing happens:
I open a post with category “downloadcenter”, delete the attached file and assign a new file (PDF) and publish it. Now there should be a featured image, I guess – but there isn’t.

Here’s my code:

function set_downloadcenter_post_thumbnail($post_id) {

	if(has_category('downloadcenter')) {

		$downloadcenter = get_field('downloadcenter', $post_id);
		$attachment_id = $downloadcenter['ID'];

		update_post_meta($post_id, '_thumbnail_id', $downloadcenter_id);

	}

}
add_action('save_post', 'set_downloadcenter_post_thumbnail');