如果使用Select2 YII2选择第一个字段，请在下方自动填充字段

I'm developing HRMS on Yii2 I have this Displacing Employee Form,3 fields using 3 tables,which is displacing,employee,and department i'm using Kartik/Select2 widget on Employee field, databases i developed is more like thisI'm developing HRMS on Yii2 I have this Displac