/** * Determines if the query should be previewed, and thus interrupted silently. * If so, this function also displays the query via the debuging system. * Subclasess should respect the results of this call for each query, and not * execute any queries that generate a true response. * * @param string $sql The query to be executed * @return boolean Flag indicating that the query was previewed */ protected function previewWrite($sql) { // Only preview if previewWrite is set, we are in dev mode, and // the query is mutable if (isset($_REQUEST['previewwrite']) && Director::isDev() && $this->connector->isQueryMutable($sql)) { // output preview message Debug::message("Will execute: {$sql}"); return true; } else { return false; } }