/**
* Creates data provider instance with search query applied
*
* @param array $params
*
* @return ActiveDataProvider
*/
public function search($params)
{
$query = InvoiceCharges::find();
$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(['invoice_id' => $this->invoice_id, 'diskaun' => $this->diskaun, 'shipping' => $this->shipping, 'gst' => $this->gst]);
return $dataProvider;
}