search is not working , in yii2 gridview -


i installed yii2 export menu.it working fine search not working properly.i cant understand whats going wrong? please fix it... here code- 

<?php         $gridcolumns = [         [         'class' => 'yii\grid\serialcolumn',         ],         'name',         'company_mail',             'created',          'modified',         'modified_by_id',         ['class' => 'yii\grid\actioncolumn', 'urlcreator'=>function(){return '#';}],      ]; ?>  <?php echo exportmenu::widget([ 'dataprovider' => $dataprovider, 'filtermodel'=>$searchmodel, 'columns' => $gridcolumns, 'target' => exportmenu::target_blank,   ]);   ?> <?php  echo gridview::widget([ 'dataprovider' => $dataprovider, 'filtermodel' => $searchmodel, 'columns' => $gridcolumns, ]);  ?>

add following function search model

public function search($params)     {         $query = yourmodel::find();          $dataprovider = new activedataprovider([             'query' => $query,             'sort' => [                 'defaultorder' => [                  ]             ],         ]);          $this->load($params);          if (!$this->validate()) {             // uncomment following line if not want return records when validation fails             // $query->where('0=1');             return $dataprovider;         }           $query->andfilterwhere(['like', 'name', $this->name])             ->andfilterwhere(['like', 'company_mail', $this->company_mail])             ->andfilterwhere(['like', 'modified', $this->modified])             ->andfilterwhere(['like', 'created', $this->created])             ->andfilterwhere(['like', 'modified_by_id', $this->modified_by_id]);          return $dataprovider;     }

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