/**
  * Set the CMS grid search context
  *
  * @since version 1.0.0
  *
  * @return object
  **/
 public function getSearchContext()
 {
     if (!Controller::curr() instanceof SEO_ModelAdmin) {
         return parent::getSearchContext();
     }
     Config::inst()->update($this->modelClass, 'searchable_fields', SEO_FieldValues::SearchableFields());
     $context = parent::getSearchContext();
     $context->getFields()->fieldByName('q[Robots]')->setEmptyString('- select -')->setSource(SEO_FieldValues::IndexRules());
     $context->getFields()->fieldByName('q[ChangeFrequency]')->setEmptyString('- select -')->setSource(SEO_FieldValues::SitemapChangeFrequency());
     $context->getFields()->fieldByName('q[HideSocial]')->setTitle('Social Meta hidden:')->setEmptyString('- select -')->setSource(SEO_FieldValues::YesNo());
     return $context;
 }