php - Yii. Object of class AppCompany could not be converted to string on validation -


i've been trying implement ar relations: http://www.yiiframework.com/wiki/19/how-to-use-a-single-form-to-collect-data-for-two-or-more-models/ , doing:

public function actioncreate() {     $application = new application;     $company = new appcompany;      // uncomment following line if ajax validation needed     // $this->performajaxvalidation($model);      if(isset($_post['application'], $_post['appcompany']))     {         $application->attributes=$_post['application'];         $company->attributes=$_post['appcompany'];          $valid=$application->validate();         $valid=$company->validate() && $valid;          if($valid)           {               if($application->save(false))             {                 $company->applicant_id = $application->id;                 $company->save(false);                 $this->redirect(array('view','id'=>$application->id));             }          }      }      $this->render('create',array(         'application'=>$application,         'company'=>$company,     )); }

then, when try create new application , enter valid data - data saves both tables. if leave fields empty (while required), have error: object of class appcompany not converted string on validation.

please, kindly figure me on mistake?


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