Ticket #22191: 22191.diff

wp-includes/meta.php

@@ -123 +123 @@
         if ( null !== $check )
                 return (bool) $check;
 
-        if ( ! $meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) )
-                return add_metadata($meta_type, $object_id, $meta_key, $passed_value);
-
         // Compare existing value to new value if no prev value given and the key exists only once.
         if ( empty($prev_value) ) {
                 $old_value = get_metadata($meta_type, $object_id, $meta_key);
@@ -135 +132 @@
                 }
         }
 
+        if ( ! $meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) )
+                return add_metadata($meta_type, $object_id, $meta_key, $passed_value);
+
         $_meta_value = $meta_value;
         $meta_value = maybe_serialize( $meta_value );