Ticket #17379: export-with-attachments.diff

wp-admin/includes/export.php

@@ -29 +29 @@
                 'start_date' => false, 'end_date' => false, 'status' => false,
         );
         $args = wp_parse_args( $args, $defaults );
+        $get_attachments = false;
 
         /**
          * Fires at the beginning of an export, before any headers are sent.
@@ -53 +54 @@
                         $args['content'] = 'post';
 
                 $where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] );
+                $get_attachments = true;
         } else {
                 $post_types = get_post_types( array( 'can_export' => true ) );
                 $esses = array_fill( 0, count($post_types), '%s' );
@@ -86 +88 @@
         // Grab a snapshot of post IDs, just in case it changes during the export.
         $post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" );
 
+        if ( $get_attachments ) {
+                $attachments_parents = $post_ids;
+
+                // fetch attachments, 20 posts at a time
+                while ( $next_posts = array_splice( $attachments_parents, 0, 20 ) ) {
+                        $attachment_ids = $wpdb->get_col( "SELECT ID
+                                FROM {$wpdb->posts}
+                                WHERE {$wpdb->posts}.post_type ='attachment'
+                                AND {$wpdb->posts}.post_parent IN (".implode(',', $post_ids).")" );
+
+                        $thumbnails_ids = $wpdb->get_col( "SELECT meta_value
+                                FROM {$wpdb->postmeta}
+                                WHERE {$wpdb->postmeta}.post_id IN (".implode(',', $post_ids).")
+                                AND {$wpdb->postmeta}.meta_key = '_thumbnail_id'" );
+
+                        $post_ids = array_merge($post_ids, $attachment_ids, $thumbnails_ids);
+                }
+
+                // remove posible duplicated ids
+                $post_ids = array_unique($post_ids);
+        }
+
         /*
          * Get the requested terms ready, empty unless posts filtered by category
          * or all content.