在yii

Question

它不会在我的多选下拉列表中显示默认选择值，我没有收到错误。是下拉列表接受数组的defalt select数组列表

public function actionCreate()
{
    .......
        $cust= implode('_',$_POST['supplier'] ['manufacture']);
        $model->customer = $cust;
        $model->save();
    ........
}
public function actionUpdate($id)
{
    $model = $this->findModel($id);
    $model->customer  = explode('_',$model->customer);
    if ($model->load(Yii::$app->request->post())) {
      $cust= implode(',',$_POST['supplier']['manufacturer']);
        $model->customer = $cust`enter code here`;
        $model->save();
        return $this->redirect(['view', 'id' => $model->ID]);
    } else {
        return $this->render('update', [
            'model' => $model,
        ]);
    }
}

视图

<?= 
$form->field($model, 'car_manufacturer[]')->dropDownList($model->getcustinfo(), [
    'multiple'=>'multiple',
    'class'=>'chosen-select input-md required',
    ]);
?>

Answer 1

嗨传递选项中的selected value

['options' => $yourvalue => ['Selected'=>'selected']]

您应该在选项中传递array

 ['options' =>
                    [                        
                      $id1 => ['selected' => true]
                    ],
                     [                        
                      $id2 => ['selected' => true]
                    ],

          ]

您可以使用foreach循环制作此array

Answer 2

您应该只使用属性名称。

<?= $form->field($model, 'car_manufacturer')->dropDownList($model->getcustinfo(), [
          'multiple'=>'multiple',
          'class'=>'chosen-select input-md required',  ])?>