Hi @byoo
Please keep in mind that the value of flexible content has a different structure. So it should be something like this:
function my_acf_save_post( $post_id ) {
// get the flexible content raw values
$flexible_content = get_field('flexible_content_field_name', $post_id, false);
// check if the post has flexible content or not
if( $flexible_content ){
// loop through the values
foreach($flexible_content as $row){
// check if the image is set in certain layout
// please change 'layout_name' with your layout name and
// 'field_1234567890abc' with the image field key
if( $row['acf_fc_layout'] == 'layout_name' && isset($row['field_1234567890abc']) ){
// update the featured image
update_post_meta($post_id, '_thumbnail_id', $row['field_1234567890abc']);
}
}
}
}
// run after ACF saves the $_POST['acf'] data
add_action('acf/save_post', 'my_acf_save_post', 20);
Where “flexible_content_field_name” is the flexible content field name, “layout_name” is the layout name where the image field is located, and “field_1234567890abc” is the image field key.
I hope this helps 🙂
