Iām going to share this for the community and hoping this gets better along the way. I was trying to query the medias uploaded to a post through a custom field (Metabox/Advanced Images) and display them in a Gallery using the Bricks query loop for Medias (Query Loop ā Bricks Academy). But since the images are not automatically attached to the current post they are being uploaded to (it is acknowledged by Metabox support), the query using āchild of : {post_id}ā does not work.
I have found out there are two steps necessary :
#1 Amend Query Post_in For Gallery (given by Bricks support), replace āmg_projet_galerie_imagesā by your own custom field and āyeamhoā by the ID of your element with the query loop. Using this technique, you do NOT set āchild of: {post_id}ā, you leave it blank :
<?php
add_filter( 'bricks/posts/query_vars', function( $query_vars, $settings, $element_id ) {
if ( $element_id !== 'yeamho') return $query_vars;
$gallery_images = (array) rwmb_meta( 'mg_projet_galerie_images', ['size' => 'full'] );
$gallery_images_ids = array_keys($gallery_images);
// if no gallery images, set empty string array
$gallery_images_ids = count($gallery_images_ids) > 0 ? $gallery_images_ids : [''];
$query_vars['post__in'] = $gallery_images_ids;
return $query_vars;
}, 10, 3 );
#2 Make sure the uploaded media attachments are automatically attached to the current post they uploaded to (replace āmg_projet_galerie_imagesā by your own custom field). It appears for me I do not necessarily need to set the query loop (media type) to āchild of: {post_id}ā as explained in the Bricks academy tutorial. To automatically attach/detach images to the post use this code (edit : replace with newer one below) :
<?php
add_action('save_post', 'update_image_data');
function update_image_data($post_id){
$images = get_post_meta($post_id, 'mg_projet_galerie_images', true);
if(!empty($images)){
foreach($images as $image){
wp_update_post(array('ID' => $image, 'post_parent' => $post_id));
}
}
}
Now to make this better, I have to find a way to remove (un-attach) the medias if removed from the current post. I hope this will help some of you.
EDIT 2023/01/13 : I found the way to automatically attach & detach images from post when removed from the custom field (MetaBox Advanced Image) :
<?php
add_action('save_post', 'update_detach_image_data');
function update_detach_image_data($post_id) {
$current_images = get_post_meta($post_id, 'mg_projet_galerie_images', false);
if(!empty($current_images)){
foreach($current_images as $current_image){
wp_update_post(array('ID' => $current_image, 'post_parent' => $post_id));
}
}
$query_args = array(
'post_type' => 'attachment',
'post_parent' => $post_id,
'post_status' => 'any',
'posts_per_page' => -1,
'fields' => 'ids',
'no_found_rows' => true
);
$attachments_query = new WP_Query($query_args);
$attachments = $attachments_query->posts;
$detach_images = array_diff($attachments, $current_images);
if (!empty($detach_images)) {
foreach ($detach_images as $detach_image) {
wp_update_post(array('ID' => $detach_image, 'post_parent' => 0));
}
}
}
Just make sure, you use one field that you push in the CPT not two with the same ID.