This wiki is to show you how to use jQuery get and JSON to get data from a dropdown/any form field and fill form fields with the values instantaneously. First, I'll give example use cases of what I'm going to teach you so you can quickly see if this is for you.
Search Models are a very elegant and powerful way to build an Active Data Provider. If you use them a lot, you'll quickly need to use scenarios, which will lead you to a very DRY Controller code.
// In Yii 1.x $form = $this->beginWidget('CActiveForm', [
'id' => 'order-search-form',
'method' => 'get',
]);
echo $form->textInput($searchModel, 'id');
echo CHtml::submitButton('Find', ['class' => 'btn btn-primary']);
$this->endWidget();
`