YII实现dropDownList 联动事件

因功能需求，需要用到联动，特此记录分享

一、视图中

    


    field($model, 'cid')->dropDownList(
        \common\models\service\common\Category::getCateOptions(),
        [
            'prompt' => '请选择单位',
            'onchange'=>'
                $.post("/carousel/main/cate?id='.'"+$(this).val(),function(data){
                    $("select#main-aid").html(data);
                });',
        ]
    )->hint('父级，必选') ?>
    field($model, 'aid')->dropDownList( \common\models\service\common\Category::getCateOptions(), ['prompt' => '请选择子级']) ?>
    

         'btn btn-success']) ?>
    

    

二、控制器

ublic function actionCate($id)
{
    $departments = Category::find()
        ->where(['parent_id' => $id])
        ->asArray()
        ->all();

    if(!$departments){
        echo ""  . "";
    }
    foreach ($departments as $department) {
        echo "" . $department['name'] . "";
    }
}

三、实现效果