hello all,
i have problem with search date range Yii2 with unix timestamp. i cannot search created_at of my data i’ve try to follow some tutorial but still not work.
here’s my modelSearch
public function search2($params)
    {
    	$query = AskPolicy::find();
    	$query-> innerJoinWith(['askPos'])
    	->andwhere("ask_policy.id = ask_po.id_policy")
    	->innerjoinWith(['client'])->andWhere(['id_client'=>Yii::$app->user->identity->id_client])->all();
        $dataProvider = new ActiveDataProvider([
            'query' => $query,
        ]);
        $this->load($params);
        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
            // $query->where('0=1');
            return $dataProvider;
        }
        $query->andFilterWhere([
            'id' => $this->id,
            'ask_policy.created_at' => $this->start_date,
            'ask_policy.created_at' => $this->end_date,
            'printed_at' => $this->printed_at,
        ]);
//         $query->andFilterWhere(['>=', 'ask_policy.created_at',$this->start_date]);
//         $query->andFilterWhere(['<=', 'ask_policy.created_at',$this->end_date]);
        $query->andFilterWhere(['>=',"(date_format(FROM_UNIXTIME(ask_policy.`created_at` ), '%Y-%m-%d' ))", $this->start_date])
        ->andFilterWhere(['<=', "(date_format(FROM_UNIXTIME(ask_policy.`updated_at` ), '%Y-%m-%d' ))", $this->end_date]);
        return $dataProvider;
    } 
here’s my controller
    
public function actionIndex()
    {
        $searchModel = new AskPolicySearch();
        $dataProvider = $searchModel->search2(Yii::$app->request->queryParams);
        return $this->render('index', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }
here’s my form _search and index page(grid)
<?php
use yii\helpers\Html;
use yii\widgets\ActiveForm;
// use yii\jui\DatePicker;
use trntv\yii\datetime\DateTimeWidget;
/* @var $this yii\web\View */
/* @var $model backend\modules\ask_marine_cargo\models\search\AskPolicySearch */
/* @var $form yii\widgets\ActiveForm */
?>
<div class="form-ask-policy-search">
    <?php $form = ActiveForm::begin([
        'action' => ['index'],
        'method' => 'get',
    ]); ?>
    <?= $form->field($model, 'id', ['template' => '{input}'])->textInput(['style' => 'display:none']); ?>
    <?php echo $form->field($model, 'start_date')->widget(
        DateTimeWidget::className(),
        [
            'phpDatetimeFormat' => 'yyyy-MM-dd'
        ]
    ) ?>
		<?= $form->field ( $model, 'end_date' )->widget (DateTimeWidget::classname (),
		[
      'phpDatetimeFormat' => 'yyyy-MM-dd'
		])
    	?>
    <?php /* echo $form->field($model, 'id_client')->widget(\kartik\widgets\Select2::classname(), [
        'data' => \yii\helpers\ArrayHelper::map(\backend\modules\ask_marine_cargo\models\AskClient::find()->orderBy('id')->asArray()->all(), 'id', 'id'),
        'options' => ['placeholder' => Yii::t('ask_marine_cargo', 'Choose Ask client')],
        'pluginOptions' => [
            'allowClear' => true
        ],
    ]); */ ?>
    <?php /* echo $form->field($model, 'delete_on')->textInput(['placeholder' => 'Delete On']) */ ?>
    <?php /* echo $form->field($model, 'printed_at')->textInput(['placeholder' => 'Printed At']) */ ?>
    <div class="form-group">
        <?= Html::submitButton(Yii::t('ask_marine_cargo', 'Search'), ['class' => 'btn btn-primary']) ?>
        <?= Html::resetButton(Yii::t('ask_marine_cargo', 'Reset'), ['class' => 'btn btn-default']) ?>
    </div>
    <?php ActiveForm::end(); ?>
</div>
maybe somebody could give step by step for solve my problem. thank you so much