Ticket #24933: 24933-1.patch

wp-includes/meta.php

@@ -151 +151 @@
         if ( 'post' == $meta_type )
                 do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
 
-        $wpdb->update( $table, $data, $where );
+        $updated = $wpdb->update( $table, $data, $where );
 
-        wp_cache_delete($object_id, $meta_type . '_meta');
+        if ( $updated ) {
+                wp_cache_delete($object_id, $meta_type . '_meta');
 
-        do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
+                do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
-        if ( 'post' == $meta_type )
-                do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
+                if ( 'post' == $meta_type )
+                        do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
 
-        return true;
+                return true;
+        } else {
+                return false;
+        }
 }
 
 /**