显示名称而不是ID - YII2

Question

In my form I have the category_id, In the drop-down, it displays the name but after saving it displays the ID, how do I display the name instead of the ID?

<?= $form->field($model, 'category_id')->dropDownlist(
     ArrayHelper::map(Category::find()->all(), 'id', 'category_name'),
     [
         'prompt' => 'Select Category',
         'onchange' => '$.post( "index.php?r=sub-cat/lists&id='.'"+$(this).val(), function( data ) {
                $( "select#tickets-sub_category" ).html( data );
          });'
     ]); 
?>

What I have tried so far in the view is this:

[
   'label' => $model->category_id->getAttributeLabel('category_name'),
   'value' => $model->category_id->category_name
]

But I'm getting an error: Call to a member function getAttributeLabel() on integer

Answer 1

please try this code in your grid-view.

['label'=>'Category Name',
'value' => function ($data) {
     return Category::findOne(['id'=>$data->category_id])->category_name;
},]