Get data from form field to button value in yii2 - yii2

Question

I have a form field and a button in a form. The button should get the data from the form field and pass the value as parameter. Please tell me how can I get the data from the form field and pass the value.
form field -
<?= $form->field($model, 'productname')->textInput(['maxlength' => true]) ?>
button
<?= Html::a('Search', ['/stock/sellitem/printproductledger3', 'productname' => '8904187001305'], ['class'=>'btn btn-primary']) ; ?>
The above example work fine because the value is already given here 'productname' => '8904187001305'
What I need to do is get the value '8904187001305' from the form field. Please help.
actionIndex
public function actionIndex2()
{
$searchModel = new SellitemsbdtSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('_formbtdt', [
'model' => $searchModel,
]);
}
This index leads to _formdtbt
'action' => ['/stock/sellitem/printproductledger3',],
<?= $form->field($model, 'productname')->textInput(['maxlength' => true,]) ?>
<?= Html::submitButton('Search', ['class' => 'btn btn-primary']) ?>
Controller action printproductledger3
public function actionPrintproductledger3() {
$searchModel1 = new SellitemsbdtSearch();
$dataProvider1 = $searchModel1->search(Yii::$app->request->get());
$searchModel2 = new PuritemsbdtSearch();
$dataProvider2 = $searchModel2->search(Yii::$app->request->get());
return $this->render('_printproductledgerbtdt', [
'dataProvider1' => $dataProvider1,
'searchModel1' => $searchModel1,
'searchModel2' => $searchModel2,
'dataProvider2' => $dataProvider2,
]);
}
Well, I think I've pointed to wrong issue. The issue is model sellitemsbdtSearch is getting filtered but puritemsbdtSearch is not getting filtered.
Search Model sellitemsbdtSearch
public function search($params)
{
//$query = Sellitem::find();
$query = Sellitem::find()
->joinWith(['siSs'])
->select(['sellsum.ss_date as date','si_iupc','si_idesc', 'concat("By sales to Tax Invoice ", sellsum.ss_invno) as particular', 'si_qty as sellqty','(si_qty * si_rate) as value'])
->orDerBy([
'sellsum.ss_date'=>SORT_DESC,
]);
// add conditions that should always apply here
$dataProvider = new ActiveDataProvider([
'query' => $query,
'pagination' => ['pageSize' => 10000000000,],
]);
if (!($this->load($params) && $this->validate())) {
return $dataProvider;
}
if($this->productname){
$query->andFilterWhere(['si_iupc'=> $this->productname]);
return $dataProvider;
}
}
Search Model puritemsbdtSearch
public function search($params)
{
$query = Puritem::find()
->joinWith(['psi'])
->select(['pursum.ps_date as date','pi_upc','pi_desc', 'concat("By purchase to Tax Invoice ", pursum.ps_invno) as particular', 'pi_qty as buyqty','(pi_qty * pi_rate) as value'])
->orDerBy([
'pursum.ps_date'=>SORT_DESC,
]);
// add conditions that should always apply here
$dataProvider = new ActiveDataProvider([
'query' => $query,
'pagination' => ['pageSize' => 10000000000,],
]);
if (!($this->load($params) && $this->validate())) {
return $dataProvider;
}
if($this->productname){
$query->andFilterWhere(['pi_upc'=> $this->productname]);
return $dataProvider;
}
}

Answer 1

You could use this way for sending the value of the model to your action
<?php $form = ActiveForm::begin([
'action' => ['your_action'],
'method' => 'your_method ', /// get or post
]); ?>
<?= $form->field($model, 'productname')->textInput(['maxlength' => true]) ?>
<div class="form-group">
<?= Html::submitButton('Search', ['class' => 'btn btn-primary']) ?>
<?= Html::resetButton('Reset', ['class' => 'btn btn-default']) ?>
</div>
<?php ActiveForm::end(); ?>
once submit you cant get the value in the normale yii2 way
you can see this for more .. http://www.yiiframework.com/doc-2.0/guide-input-forms.html
for the second Model that don't have the same realetd model and filed as the first you should use
// in $get try retrive the content of $get (in this case i related your yourModel1)
$get = Yii::$app->request->get(['yourModel1'])
// and the use the value for searching in your model2 with the proper value
// obviously you should adatp the name in this sample with the proper ones
$searchModel2 = new PuritemsbdtSearch();
$dataProvider2 = $searchModel2->search(['YourModelSearch2Name'=>['yourAttributeYouNeed'=>$get['productname']]]);