什么是depdrop中的$ catList - Kartik yii2 widget方案1?

时间:2016-11-27 18:18:17

标签: php yii yii2 widget

我认为我在depdrop小部件中的方案1示例中遗漏了一些内容,这是代码:

/*
 * SCENARIO 1: A 3-level nested dependency example
 */
// THE VIEW
use kartik\widgets\DepDrop;

// Parent 
echo $form->field($model, 'cat')->dropDownList($catList, ['id'=>'cat-id']);

// Child # 1
echo $form->field($model, 'subcat')->widget(DepDrop::classname(), [
    'options'=>['id'=>'subcat-id'],
    'pluginOptions'=>[
        'depends'=>['cat-id'],
        'placeholder'=>'Select...',
        'url'=>Url::to(['/site/subcat'])
    ]
]);

// Child # 2
echo $form->field($model, 'prod')->widget(DepDrop::classname(), [
    'pluginOptions'=>[
        'depends'=>['cat-id', 'subcat-id'],
        'placeholder'=>'Select...',
        'url'=>Url::to(['/site/prod'])
    ]
]);

// THE CONTROLLER
public function actionSubcat() {
    $out = [];
    if (isset($_POST['depdrop_parents'])) {
        $parents = $_POST['depdrop_parents'];
        if ($parents != null) {
            $cat_id = $parents[0];
            $out = self::getSubCatList($cat_id); 
            // the getSubCatList function will query the database based on the
            // cat_id and return an array like below:
            // [
            //    ['id'=>'<sub-cat-id-1>', 'name'=>'<sub-cat-name1>'],
            //    ['id'=>'<sub-cat_id_2>', 'name'=>'<sub-cat-name2>']
            // ]
            echo Json::encode(['output'=>$out, 'selected'=>'']);
            return;
        }
    }
    echo Json::encode(['output'=>'', 'selected'=>'']);
}

public function actionProd() {
    $out = [];
    if (isset($_POST['depdrop_parents'])) {
        $ids = $_POST['depdrop_parents'];
        $cat_id = empty($ids[0]) ? null : $ids[0];
        $subcat_id = empty($ids[1]) ? null : $ids[1];
        if ($cat_id != null) {
           $data = self::getProdList($cat_id, $subcat_id);
            /**
             * the getProdList function will query the database based on the
             * cat_id and sub_cat_id and return an array like below:
             *  [
             *      'out'=>[
             *          ['id'=>'<prod-id-1>', 'name'=>'<prod-name1>'],
             *          ['id'=>'<prod_id_2>', 'name'=>'<prod-name2>']
             *       ],
             *       'selected'=>'<prod-id-1>'
             *  ]
             */

           echo Json::encode(['output'=>$data['out'], 'selected'=>$data['selected']]);
           return;
        }
    }
    echo Json::encode(['output'=>'', 'selected'=>'']);
}

每当我尝试这个时它会说$ catList是一个未定义的变量,该变量来自哪里? 假设我有一个模型/控制器cat,sub-cat和prod,这些是相关的。

如果有人能以正确的方式指导我,那将会非常有帮助! 感谢

1 个答案:

答案 0 :(得分:0)

表示您希望在下拉列表中显示的值列表

 $catList=Category::find()->all();

  $catList  = ['a' => 'Item A', 'b' => 'Item B', 'c' => 'Item C'];