Dynamic Subform based on model reference

Hi there,

I have read up on tabular data and forms with 2 or more models, but they don’t quite fit for what I’m trying to accomplish, or if they do, I’m not quite getting it.

I have a model widget

with fields widget_id, widget_name, widget_type_id widget_config_data… ect.

widget_id and widget_name are self explanatory

widget_type_id references the model widget_type

model widgettype has the fields widget_type_id, label, modelname

widget_config_data stores a serialized array

There are 4 records in model widgettype

1, widget a, Widgeta

2, widget b, Widgetb


In \app\models\ I have Widget.php, Widgettype.php, Widgeta.php Widgetb.php etc…

Which define the fields necessary for the specific widgettype to function. i.e.

Widgeta defines the fields connection_string, username, password

Widgetb defines the fields source_url, local_filepath, remote_filepath

So, in my widget form, instead of the textfield “widget_config_data”

I want use the widgettype’s reference to the corresponding model to display a subform built off the definitions of the widget type


if widget_id 1 has widgettype = Widgeta

I want a form that shows the fields defined in the model Widgeta

connection_string, username, password,

and for that form populated by the values in the serialized array stored in the field widget.widget_config_data.

My plan was to have the model $widget->widget_config_data field be hidden and populated via jquery with the serialized values of the subform generated by model Widgeta

Any guidance would be much appreciated.

Clear as mud?

Here’s where I’m at so far:



use app\models\Widget;

use app\models\WidgetTypeAConfigForm;


    public function actionCreate()


        $model = new Widget();

	$widgettypea = new WidgetTypeAConfigForm();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {

            return $this->redirect(['view', 'id' => $model->import_channels_id]);

        } else {

            return $this->render('create', [

                'model' => $model,

		'widgettypea' => $widgettypea,






use app\models\Widgettype;

use app\models\WidgettypeaConfigForm;



		foreach($widgettype as $wt){


        <div id="widget_type_<?= $wt->widget_type_id ?>">	

			<?= $this->render('@app/views/'.strtolower($wt->method).'configform.php') ?>  // for this example rendering file /views/widgettypeaconfigform.php







use yii\helpers\Html;

use yii\widgets\ActiveForm;

/* @var $this yii\web\View */

/* @var $widgettypea \app\models\WidgettypeaConfigForm */

/* @var $form ActiveForm */


<div class="widgettypeaconfigform">

    <?php $form = ActiveForm::begin(); ?>

        <?= $form->field($widgettypea, 'field1') ?>

        <?= $form->field($widgettypea, 'field2') ?>

        <?= $form->field($widgettypea, 'field3') ?>

        <?= $form->field($widgettypea, 'field4') ?>


        <div class="form-group">

            <?= Html::submitButton('Submit', ['class' => 'btn btn-primary']) ?>


    <?php ActiveForm::end(); ?>




namespace app\models;

use Yii;

use yii\base\Model;

class WidgettypeaConfigForm extends Model


    public $field1;

    public $field2;

    public $field3;

    public $field4;

    public function rules()


        return [

            [['field1', 'field2', 'field3', 'field4'], 'required'],




Getting Error Message:

Undefined variable: widgettypea 

in /views/widgettypeaconfigform.php

line:         <?= $form->field($widgettypea, 'field1') ?>