add thumbnail_id to gallery id db table

• nidr0x

• March 9, 2023 at 8:49 pm

Hello,

I’m trying to add the main ID of the post image to the ACF gallery database table, but I’m not getting it, because when I add it via update_field it adds correctly, but I lose the rest of the images of the gallery.

$post_thumb = get_post_thumbnail_id( get_the_ID() );
update_field( 'gallery', $post_thumb, get_the_ID() );

Can anybody help me please?

• John Huebner

• March 11, 2023 at 10:49 am

A gallery field stores an array of post ID’s. To add an image you first need to get the value and add the new ID value to it.

$gallery = get_field('gallery', get_the_ID(), false); // get unformatted value
if (empty($gallery)) {
  $gallery = array();
}
$gallery[] = get_post_thumbnail_id(get_the_ID());
update_field('gallery', $gallery, get_the_ID());

• nidr0x

• March 11, 2023 at 11:57 am

This works perfectly @hube2, thank you so much!!!

I am very happy now, thanks!!!

• nidr0x

• March 18, 2023 at 3:42 pm

Hello again @hube2,

Is there a way to make the post_thumbnail_id the first item in the gallery and not the last?

The code you posted works correctly, but the thumbnail is added as the last item in the gallery.

I would appreciate some help on this, please.

• John Huebner

• March 19, 2023 at 10:36 am

https://support.advancedcustomfields.com/forums/topic/add-thumbnail_id-to-gallery-id-db-table/#post-160154

array_unshift($gallery, get_post_thumbnail_id(get_the_ID());

• nidr0x

• March 19, 2023 at 11:59 am

Works correctly, thanks again John Huebner!

• [email protected]

• July 18, 2023 at 9:10 pm

Thanks works as expected!