From 6ea8ad96efccd5b2fafb878ec369924c098cc32b Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Thu, 18 Feb 2010 07:43:35 +0000
Subject: [PATCH] Clean attachment cache when reattaching, fixes #11647

git-svn-id: https://develop.svn.wordpress.org/trunk@13192 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/upload.php  |  1 +
 wp-includes/post.php | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/wp-admin/upload.php b/wp-admin/upload.php
index d6222a5789..eaa9b7cbe3 100644
--- a/wp-admin/upload.php
+++ b/wp-admin/upload.php
@@ -43,6 +43,7 @@ if ( isset($_GET['find_detached']) ) {
 			continue;
 
 		$attach[] = $att_id;
+		clean_attachment_cache($att_id);
 	}
 
 	if ( ! empty($attach) ) {
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 9f401d0bc5..a519103afd 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -3906,6 +3906,41 @@ function update_postmeta_cache($post_ids) {
 	return update_meta_cache('post', $post_ids);
 }
 
+/**
+ * Will clean the attachment in the cache.
+ *
+ * Cleaning means delete from the cache. Optionaly will clean the term
+ * object cache associated with the attachment ID.
+ *
+ * This function will not run if $_wp_suspend_cache_invalidation is not empty. See
+ * wp_suspend_cache_invalidation().
+ *
+ * @package WordPress
+ * @subpackage Cache
+ * @since 3.0
+ *
+ * @uses do_action() Calls 'clean_attachment_cache' on $id.
+ *
+ * @param int $id The attachment ID in the cache to clean
+ * @param bool $clean_terms optional. Whether to clean terms cache
+ */
+function clean_attachment_cache($id, $clean_terms = false) {
+	global $_wp_suspend_cache_invalidation, $wpdb;
+
+	if ( !empty($_wp_suspend_cache_invalidation) )
+		return;
+
+	$id = (int) $id;
+
+	wp_cache_delete($id, 'posts');
+	wp_cache_delete($id, 'post_meta');
+
+	if ( $clean_terms )
+		clean_object_term_cache($id, 'attachment');
+
+	do_action('clean_attachment_cache', $id);
+}
+
 //
 // Hooks
 //