/**
  * Get the validation javascript as file path.
  *
  * @param \FormModel        $model    The form model.
  * @param \FormFieldModel[] $fields   The form fields.
  * @param ValidationModel   $settings The validation settings.
  *
  * @return string
  */
 protected function getValidationJavascript($model, $fields, $settings)
 {
     if (!$this->cache->isCached($model->id, $this->locale) || \Config::get('bypassCache')) {
         $validation = $this->assembler->assemble($model, $fields, $settings, $this->locale);
         $javascript = $this->buildJavascript($validation);
         $this->cache->save($model->id, $javascript, $this->locale);
     }
     return $this->cache->filename($model->id, $this->locale);
 }