Yii2 Dynamic Form - yii

Question

I'm using wbraganca's dynamicform samples codes for mine own project. My code with its corresponding errors are as follows.
Under the view folder
_form.php
<?php
use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\helpers\ArrayHelper;
use frontend\models\Items;
use frontend\models\Employees;
use frontend\models\Departments;
use dosamigos\datepicker\DatePicker;
use wbraganca\dynamicform\DynamicFormWidget;
/* #var $this yii\web\View */
/* #var $model backend\models\Borrow */
/* #var $form yii\widgets\ActiveForm */
$js = '
jQuery(".dynamicform_wrapper").on("afterInsert", function(e, item) {
jQuery(".dynamicform_wrapper .panel-title-address").each(function(index) {
jQuery(this).html("Items: " + (index + 1))
});
});
jQuery(".dynamicform_wrapper").on("afterDelete", function(e) {
jQuery(".dynamicform_wrapper .panel-title-address").each(function(index) {
jQuery(this).html("Items: " + (index + 1))
});
});
';
$this->registerJs($js);?>
<div class="borrow-form">
<?php $form = ActiveForm::begin(['id'=>'dynamic-form']); ?>
<div class="row">
<div class="col-xs-4">
<?= $form->field($model,'dept_id')->dropDownList(
ArrayHelper::map(Departments::find()->all(),'id','dept_name'),
['prompt'=>'select departments'])
?>
</div>
<div class="col-xs-4">
<?=$form->field($model, 'return_date')->widget(
DatePicker::className(), [
'inline' => false,
'clientOptions' => [
'autoclose' => true,
'format' => 'yyyy-mm-dd'
]
]);?>
</div>
</div>
<div class="padding-v-md">
<div class="line line-dashed"></div>
</div>
<!-- beginning of dynamic form -->
<?php DynamicFormWidget::begin([
'widgetContainer' => 'dynamicform_wrapper', // required: only alphanumeric characters plus "_" [A-Za-z0-9_]
'widgetBody' => '.container-items', // required: css class selector
'widgetItem' => '.item', // required: css class
'limit' => 10, // the maximum times, an element can be added (default 999)
'min' => 1, // 0 or 1 (default 1)
'insertButton' => '.add-item', // css class
'deleteButton' => '.remove-item', // css class
'model' => $modelsAddress[0],
'formId' => 'dynamic-form',
'formFields' => [
'items_id',
'unit',
'request',
'allowed',
],
]); ?>
<div class="panel panel-default">
<div class="panel-heading">
<h4><i class="glyphicon glyphicon-envelope"></i> Items
</h4>
</div>
<div class="panel-body">
<div class="container-items"><!-- widgetBody -->
<?php foreach ($modelsAddress as $i => $modelAddress): ?>
<div class="item panel panel-default"><!-- widgetItem -->
<div class="panel-heading">
<h3 class="panel-title pull-left">Items</h3>
<div class="pull-right">
<button type="button" class="add-item btn btn-success btn-xs"><i class="glyphicon glyphicon-plus"></i></button>
<button type="button" class="remove-item btn btn-danger btn-xs"><i class="glyphicon glyphicon-minus"></i></button>
</div>
<div class="clearfix"></div>
</div>
<div class="panel-body">
<?php
// necessary for update action.
if (! $modelAddress->isNewRecord) {
echo Html::activeHiddenInput($modelAddress, "[{$i}]id");
}
?>
<div class="row">
<div class="col-xs-4">
<?= $form->field($modelAddress, "[{$i}]items_id")->dropDownList(
ArrayHelper::map(Items::find()->all(),'id','item_name'),
['prompt'=>'select items']) ?>
</div>
<div class="col-xs-2">
<?= $form->field($modelAddress, "[{$i}]unit")->textInput(['maxlength' => true]) ?>
</div>
<div class="col-xs-2">
<?= $form->field($modelAddress, "[{$i}]request")->textInput(['maxlength' => true]) ?>
</div>
<div class="col-xs-2">
<?= $form->field($modelAddress, "[{$i}]allowed")->textInput(['maxlength' => true]) ?>
</div>
<div class="col-xs-2">
<?= $form->field($modelAddress, "[{$i}]unit_price")->textInput(['maxlength' => true]) ?>
</div>
</div><!-- .row -->
</div>
</div>
<?php endforeach; ?>
</div>
</div>
</div><!-- .panel -->
<?php DynamicFormWidget::end(); ?>
<!-- end dynamic form-->
<div class="row">
<div class="col-xs-5">
<?= $form->field($model,'emp_id')->dropDownList(
ArrayHelper::map(Employees::find()->all(),'id','emp_name'),
['prompt'=>'select employees'])
?>
<?= $form->field($model,'head_id')->dropDownList(
ArrayHelper::map(Employees::find()->all(),'id','emp_name'),
['prompt'=>'select dept heads'])
?>
<?= $form->field($model,'man_id')->dropDownList(
ArrayHelper::map(Employees::find()->all(),'id','emp_name'),
['prompt'=>'select stoke managers'])
?>
<?= $form->field($model,'keeper_id')->dropDownList(
ArrayHelper::map(Employees::find()->all(),'id','emp_name'),
['prompt'=>'select stoke keepers'])
?>
</div>
<div class="col-xs-5">
<?=$form->field($model, 'emp_date')->widget(
DatePicker::className(), [
'inline' => false,
'clientOptions' => [
'autoclose' => true,
'format' => 'yyyy-mm-dd'
]
]);?>
<?=$form->field($model, 'head_date')->widget(
DatePicker::className(), [
'inline' => false,
'clientOptions' => [
'autoclose' => true,
'format' => 'yyyy-mm-dd'
]
]);?>
<?=$form->field($model, 'man_date')->widget(
DatePicker::className(), [
'inline' => false,
'clientOptions' => [
'autoclose' => true,
'format' => 'yyyy-mm-dd'
]
]);?>
<?=$form->field($model, 'keeper_date')->widget(
DatePicker::className(), [
'inline' => false,
'clientOptions' => [
'autoclose' => true,
'format' => 'yyyy-mm-dd'
]
]);?>
</div>
</div>
<div class="form-group">
<?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
</div>
<?php ActiveForm::end(); ?>
The create action under the controller
public function actionCreate()
{
$model = new Borrow();
$modelsAddress = [new Borrow];
if ($model->load(Yii::$app->request->post())) {
$modelsAddress = Model::createMultiple(Borrow::classname());
Model::loadMultiple($modelsAddress, Yii::$app->request->post());
// validate all models
$valid = $model->validate();
$valid = Model::validateMultiple($modelsAddress) && $valid;
if ($valid) {
$transaction = \Yii::$app->db->beginTransaction();
try {
if ($flag = $model->save(false)) {
foreach ($modelsAddress as $modelAddress) {
$modelAddress->id = $model->id;
if (! ($flag = $modelAddress->save(false))) {
$transaction->rollBack();
break;
}
}
}
if ($flag) {
$transaction->commit();
return $this->redirect(['view', 'id' => $model->id]);
}
} catch (Exception $e) {
$transaction->rollBack();
}
}
}
return $this->render('create', [
'model' => $model,
'modelsAddress' => (empty($modelsAddress)) ? [new Address] : $modelsAddress
]);
}
The Model Class under the Model Folder
<?php
namespace frontend\models;
use Yii;
use yii\helpers\ArrayHelper;
class Model extends \yii\base\Model
{
/**
* Creates and populates a set of models.
*
* #param string $modelClass
* #param array $multipleModels
* #return array
*/
public static function createMultiple($modelClass, $multipleModels = [])
{
$model = new $modelClass;
$formName = $model->formName();
$post = Yii::$app->request->post($formName);
$models = [];
if (! empty($multipleModels)) {
$keys = array_keys(ArrayHelper::map($multipleModels, 'id', 'id'));
$multipleModels = array_combine($keys, $multipleModels);
}
if ($post && is_array($post)) {
foreach ($post as $i => $borrow) {
if (isset($borrow['id']) && !empty($borrow['id']) && isset($multipleModels[$borrow['id']])) {
$models[] = $multipleModels[$borrow['id']];
} else {
$models[] = new $modelClass;
}
}
}
unset($model, $formName, $post);
return $models;
}
}
It gives the following error when I run my code:
PHP Fatal Error – yii\base\ErrorException Class 'frontend\controllers\Model' not found as shown below.

Answer 1

It looks like you have not namespaced frontend\models\Model in the controller.
Add there at the beginning:
use frontend\models\Model;