Relations

public function actionCreate()
    {
        $model=new ItemHeader;
                $suppliers[] = new Supplier;
                $principal = new ItemPrincipal;

        // Uncomment the following line if AJAX validation is needed
        // $this->performAjaxValidation($model);

        if(isset($_POST['ItemHeader']))
        {
                    $model->attributes=$_POST['ItemHeader'];
                    $selected_branch = $_POST['ItemHeader']['branch_id'];
                    if(isset($_POST['ItemPrincipal'])){
                        $principal->attributes  = $_POST['ItemPrincipal'];

                    }
                    if(isset($_POST['Supplier']))
                         $suppliers = $_POST['Supplier'];


                    if($model->validate() && $principal->validate()){

                            $model->itemPrincipal = $principal;
                            $model->suppliers = array_unique($suppliers);

                            if($selected_branch == Branch::ROOT_BRANCH){
                                //Yii::app()->end();
                                //create item header for all branches
                                $branches = Branch::model()->findAll();
                                foreach($branches as $branch){
                                    $bmodel = new ItemHeader;
                                    $bmodel->attributes = $model->attributes;
                                    $bmodel->suppliers = $model->suppliers;
                                    $bmodel->itemPrincipal = $model->itemPrincipal;
                                    $bmodel->branch_id = $branch->id;
                                    $bmodel->itemPrincipal->save();
                                    $bmodel->save();
                                }
                                $this->redirect(array('admin','ItemHeader[item_code]'=>$model->item_code));
                            }
                            else{
                                $model->itemPrincipal->save();
                                 $model->save();
                            }
                            $this->redirect(array('view','id'=>$model->id));
                      }
                    }


        $this->render('create',array(
            'model'=>$model,
                        'suppliers'=>$suppliers,
                        'principal'=>$principal,
        ));
    }