通过id从单页获取附件，并将其分页。 （WordPress的）

Question

How to get attachment from single page by ID, and set 12 img per page?

'post_parent' => 145, // not working, but without this param I get all attachments

<?php
                $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
                $attachment = new WP_Query( array(
                    'post_parent' => 145, // not working, but without this param I get all attachments
                    'post_status' => 'inherit',
                    'post_type' => 'attachment',
                    'post_mime_type' => 'image/jpeg,image/gif,image/jpg,image/png',
                    'posts_per_page'  => 12,
                    'paged'           => $paged
                ) );
                if ( $attachment->have_posts() ) :
                    while ( $attachment->have_posts() ) : $attachment->the_post(); 

            ?>
                        <div class="gallery__item"><a href="<?php echo wp_get_attachment_url( $attachment->ID , false ); ?>" data-fancybox><img src="<?php echo wp_get_attachment_url( $attachment->ID , false ); ?>" alt=""></a></div>
            <?php

                    endwhile; 
                    wp_reset_postdata();
                endif;
            ?>

Answer 1

I found out what the problem was. I use post_parent and tells post ID, thinking that take all attachments from this post, but WP_Query returns me ID's of images.

I get all id's of images in array with get_post_gallery()

$gal = get_post_gallery(11,false);

and explode it

$ids = explode(',', $gal['ids']);

after then everything worked!

also I use post__in insted post_parent

The final code:

<?php
                $gal = get_post_gallery(11,false);
                $ids = explode(',', $gal['ids']);
                $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
                $attachment = new WP_Query( array(
                    'post__in' => $ids,
                    'post_status' => 'inherit',
                    'post_type' => 'attachment',
                    'post_mime_type' => 'image/jpeg,image/gif,image/jpg,image/png',
                    'posts_per_page'  => 12,
                    'paged'           => $paged
                ) );
                if ($attachment -> have_posts() ) :
                    while ($attachment -> have_posts() ) : $attachment -> the_post(); 
            ?>
                        <div class="gallery__item"><a href="<?php echo wp_get_attachment_url(); ?>" data-fancybox><img src="<?php echo wp_get_attachment_url(); ?>" alt=""></a></div>
            <?php

                    endwhile; 
                    wp_reset_postdata();
                endif;
            ?>