public function getSearchContext()
 {
     if ($this->IsEditingNews()) {
         $context = new NewsSearchContext($this->modelClass, $this);
         foreach ($context->getFields() as $field) {
             $field->setName(sprintf('q[%s]', $field->getName()));
         }
         foreach ($context->getFilters() as $filter) {
             $filter->setFullName(sprintf('q[%s]', $filter->getFullName()));
         }
         $this->extend('updateSearchContext', $context);
         return $context;
     }
     return parent::getSearchContext();
 }