public function rules()
 {
     $rules = parent::rules();
     $rules[Controller::ALL] = ['response_type' => 'application/json', 'roles' => [Controller::REQUIRED_LOGIN], 'methods' => ['post']];
     $rules['load'] = ['response_type' => 'application/json', 'roles' => [Controller::ALL], 'methods' => ['get']];
     $rules['loadReplies'] = ['response_type' => 'application/json', 'roles' => [Controller::ALL], 'methods' => ['get']];
     $rules['create'] = ['response_type' => 'application/json', 'roles' => [Controller::REQUIRED_LOGIN], 'methods' => ['post']];
     $rules['upvote'] = ['response_type' => 'application/json', 'roles' => [Controller::REQUIRED_LOGIN], 'methods' => ['post']];
     $rules['unvote'] = ['response_type' => 'application/json', 'roles' => [Controller::REQUIRED_LOGIN], 'methods' => ['post']];
     return $rules;
 }