Use closures in Yii2 ArrayDataProvider - yii2

Question

In an ActiveDataProvider you can use closures as values, like:
$dataprovider = new ArrayDataProvider([
'allModels' => $array
]);
$gridColumns = [
'attrib_1',
[
'attribute' => 'attrib_2',
'label' => 'Label_2',
'value' => function($model) {
return Html::encode($model->value_2);
}
],
'attrib_3'
];
echo GridView::widget([
'dataProvider'=> $dataprovider,
'columns' => $gridColumns
]);
Is it possible to do the same or something like this, in an ArrayDataProvider?

Answer 1

Yes. Only difference is that $model is not an object but array so:
'value' => function($model) {
return Html::encode($model['value_2']);
}

Answer 2

For this purpose, I have created an extended version of ActiveDataProvider, that for each model got from provider I call a callback.
This is the custom ActiveDataProvider, put in common\components namespace in this case.
<?php
namespace common\components;
class CustomActiveDataProvider extends \yii\data\ActiveDataProvider
{
public $formatModelOutput = null;
public function getModels()
{
$inputModels = parent::getModels();
$outputModels = [];
if($this->formatModelOutput != null)
{
for($k=0;$k<count($inputModels);$k++)
{
$outputModels[] = call_user_func( $this->formatModelOutput, $k , $inputModels[$k]);
}
}
else
{
$outputModels = $inputModels;
}
return $outputModels;
}
}
This is the action in controller that uses it. For reusability, I call a model method instead calling a clousure, but you can call also a clousure.
public function actionIndex()
{
$query = Model::find();
$dataProvider = new \common\components\CustomActiveDataProvider([
'query' => $query,
'pagination' => ['pageSize' => null],
'formatModelOutput' => function($id, $model) {
return $model->dataModelPerActiveProvider;
}
]);
return $dataProvider;
}
At last, this is the method getDataModelPerActiveProvider in model:
public function getDataModelPerActiveProvider()
{
$this->id = 1;
// here you can customize other fields
// OR you can also return a custom array, for example:
// return ['field1' => 'test', 'field2' => 'foo', 'field3' => $this->id];
return $this;
}