如何从关系模型yii2中检索数据

Question

而不是如果$ model-> id，如何将其更改为$ model-> city_name？

$this->params['breadcrumbs'][] = ['label' => $model->cluster, 'url' => ['view', 'id' => $model->id]]; 

这里是关系

public function getCityName() 
{ 
    return $this->hasOne(LibCities::className(),['city_code'=>'city_code']); 
} 

这是我tbl_targetcities

，这是我lib_cities表

样品查看..更改2这是从表lib_cities从tbl_target_Cities到CITY_NAME的ID。

Answer 1

变化$model->id到$model->cityName->city_name为label属性：

$this->params['breadcrumbs'][] = ['label' => $model->cityName->city_name, 'url' => ['view', 'id' => $model->id]];