Yii2相关下拉数据未显示

Question

我在表单中使用krajee yii2 depdrop。我按照说明操作，我的数据仍未显示在depdrop上。

这是我的_form.php代码：

    <?php echo $form->field($model, 'id_trayek')->widget(Select2::classname(), [
        'data' => ArrayHelper::map(Trayek::find()->all(), 'id_trayek', 'nama_trayek'),
        'language' => 'en',
        'theme' => Select2::THEME_KRAJEE,
        'options' => ['id' => 'id_trayek', 'placeholder' => '-- Pilih Trayek --', 'class' => 'form-control'],
    ]); ?>

    <?php
        echo $form->field($model, 'no_bus')->widget(DepDrop::classname(), [
            'type'=>DepDrop::TYPE_SELECT2,
            'options' => ['id'=>'no_bus', 'class'=>'form-control'],
            'pluginOptions'=>[
                'depends'=>['id_trayek'],
                'placeholder' => '-- Pilih Bus --',
                'url' => Url::to(['/surat-jalan/bus'])
            ]
        ]);
    ?>

这是depdrop url的控制器：

    public function actionBus() {
        $out = [];
        if (isset($_POST['depdrop_parents'])) {
            $id_trayek = end($_POST['depdrop_parents']);
            $jenis_bus = Trayek::find()->select('jenis_bus')->andWhere(['id_trayek'=>$id_trayek]);
            $list = Bus::find()->andWhere(['jenis_bus'=>$jenis_bus])->asArray()->all();
            $selected  = null;
            if ($id_trayek != null && count($list) > 0) {
                $selected = '';
                foreach ($list as $i => $bus) {
                    $out[] = ['no_bus' => $bus['no_bus'], 'no_bus' => $bus['no_bus']];
                }

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

在控制台中，我发现JSON响应没问题且错误：TypeError：id未定义在文件dependendent-dropdown.js上（第39行，第49行）

控制台出错

Answer 1

这一行不正确：

$out[] = ['no_bus' => $bus['no_bus'], 'no_bus' => $bus['no_bus']];

依赖下拉列表要求第一个数组元素为id，第二个数组元素为name。改为：

$out[] = ['id' => $bus['no_bus'], 'name' => $bus['no_bus']];