用到了yii2 hasMany() 方法，一对多关联

            [
                ‘label‘ => ‘参考‘,
                ‘format‘ => ‘html‘,
                ‘value‘ => function ($model){

                    $str=‘‘;
                    foreach($model->item->price as $value){
                        $str=$str.$value->supply->name.‘-‘.$value->price_buy.‘, ‘;
                    }
                    return $str;
                }
            ],