How to set value in array helper Yii2?

Question

I want to set value of array helper in Yii 2 as id (primary key of database). But when I use it shows me 0,1,2,3,.. not its real id number.

Here is my array helper code:

<?= Html::activeDropDownList($model, 'username',
  array_merge(array(''=>' '), ArrayHelper::map(Experts::find()->all(), 'id', 'username'))) ?>

How can I access real value of primary id??

When I use other parameter it works correctly but when I use id it shows number from 0 to up : |

Use 'prompt' attribute to set default option. <?= Html::activeDropDownList($model, 'username', ArrayHelper::map(Experts::find()->all(), 'id', 'username'), ['prompt' => '--- select'] ) ?> — Fabrizio Caldarelli
– Fabrizio Caldarelli, Commented Aug 16, 2017 at 8:33

Bizley · Accepted Answer · 2017-08-16 09:47:40Z

5

array_merge renumbers numeric array keys. Use +.

<?= Html::activeDropDownList(
    $model, 
    'username',
    ['' => ' '] + ArrayHelper::map(Experts::find()->all(), 'id', 'username')
) ?>

answered Aug 16, 2017 at 9:47

Bizley

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