Invalid argument supplied for foreach()

[packcode]

Hello guys, i am trying to collect tabular input from users below is my code when the ajax call returns from actionAddmore(), to userform.php page i am getting an error as "Invalid arguments supplied for foreach" can anyone help me. controller:

 public function actionCreate()
    {
        $model = array();
        $model[] = new Instructions();
        if (Yii::$app->request->post() && $model->validate()) {
        $model->dep_id = Yii::$app->user->identity->dep_id;
        $model->save();
            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }
 public function actionAddmore(){
         if(\Yii::$app->getRequest()->getIsAjax()) {
        //this is the post data from the ajax request
        $postData = Yii::$app->request->post('Instructions');//var_dump($postData);die;
        if (empty($postData) || !is_array($postData)) {
        throw new HttpException(500, 'An internal server error has occured.');
        }
        $model = array();
        //creating existing model instances + setting attributes
        foreach ($postData as $i => $single) {
        $model[$i] = new Instructions();
        $model[$i]->setAttributes($single);
        }
        $j=$i+1;
        //var_dump($model);die;
        //end of creating existing model instances + setting attributes
        //creating an additional empty model instance
        $model[$j] = new Instructions();
        //var_dump($model);die;
        // it has to be renderAjax in order to include the script validation files
        echo $this->renderAjax('userform',[
        'model' => $model,
        ]);
        // echo $model[0];exit;
        } else {
        throw new HttpException(404, 'Unable to resolve the request: Awards/addmore');
        }
    }

The view files are as follows:

_form.php

<?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\helpers\ArrayHelper;
use backend\models\Course;
use dosamigos\tinymce\TinyMce;
/* @var $this yii\web\View */
/* @var $model backend\models\Instructions */
/* @var $form yii\widgets\ActiveForm */
//var_dump($model);die;
?>
    <?php $dataCategory1=ArrayHelper::map(Course::find()->where(['depid'=>Yii::$app->user->identity->dep_id])->asArray()->all(), 'id', 'course_name'); ?>
<div class="instructions-form">
<div id="repeat">
    <?php $form = ActiveForm::begin(); ?>

<?php foreach ($model as $i => $single): ?>
    <div class="row">

    <div style="display:none;" class="col-md-2"><?= $form->field($single, "[$i]dep_id")->textInput() ?></div>

    <div class="col-md-4"><?= $form->field($single, "[$i]course_id")->DropDownList($dataCategory1, 
                $options=['prompt'=>"Select Course",

                    ]) ?></div>

        <div class="col-md-6"><?= $form->field($single, "[$i]instruction")->textArea()?></div>
<div class="col-md-1">
<a href="#"><span class="glyphicon glyphicon-plus-sign" id="but" style="margin-top:30px; color: green; font-size: 1.5em;"></span></a>
<a href="#"><span class="glyphicon glyphicon-minus-sign" id="rem" style="margin-top:30px; color: red; font-size: 1.5em;"></span></a>

<!-- <div class="form-group"><button id="but" class="btn btn-primary">Add</button></div>-->
</div>
</div>

 <?php endforeach; ?>
 <span style="display: none" id="ide"><?php echo $i;?></span>

    <div class="form-group">
        <?= Html::submitButton('Submit' ,['class'=>'btn btn-success']) ?>
    </div>

    <?php ActiveForm::end(); ?>
</div>
</div>
<?php
$this->registerJs("
$(document).on('click', '#but', function(){
$.ajax({
url: '" . \Yii::$app->urlManager->createUrl(['instructions/addmore']) . "',
type :'POST',
cache : false,
data: $('#" . $form->id . "').serialize(),
success: function(data) {
document.getElementById('repeat').innerHTML = data;
},
error: function() {
alert('An error has occured while adding a new block.');
}
});
});
$(document).on('click', '#rem', function(){
var count = document.getElementById('ide').innerHTML;
if(count == 0){
document.getElementById('ide').innerHTML = 0;
alert('One Row should be present in Table');
}
else{
$(this).closest('.block').remove();
count--;
document.getElementById('ide').innerHTML = count;
}
});
");
?>

userform.php

<?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;
use yii\helpers\ArrayHelper;
use backend\models\Course;
use dosamigos\tinymce\TinyMce;
/* @var $this yii\web\View */
/* @var $model backend\models\Instructions */
/* @var $form yii\widgets\ActiveForm */
//echo '<pre>';var_export($model);die;
?>

<?php $form = ActiveForm::begin(); ?>
if (!empty($model)) {
<?php foreach ( $model as $i => $value){ ?>
    <div class="row">

    <div style="display:none;" class="col-md-2"><?= $form->field($value, "[$i]dep_id")->textInput() ?></div>

    <div class="col-md-4"><?= $form->field($value, "[$i]course_id")->DropDownList($dataCategory1, 
                $options=['prompt'=>"Select Course",

                    ]) ?></div>

        <div class="col-md-6"><?= $form->field($value, "[$i]instruction")->textArea()?></div>
<div class="col-md-1">
<a href="#"><span class="glyphicon glyphicon-plus-sign" id="but" style="margin-top:30px; color: green; font-size: 1.5em;"></span></a>
<a href="#"><span class="glyphicon glyphicon-minus-sign" id="rem" style="margin-top:30px; color: red; font-size: 1.5em;"></span></a>

<!-- <div class="form-group"><button id="but" class="btn btn-primary">Add</button></div>-->
</div>
</div>

 <?php } ?>
 <span style="display: none" id="ide"><?php echo $i;?></span>

    <div class="form-group">
        <?= Html::submitButton('Submit' ,['class'=>'btn btn-success']) ?>
    </div>
}
    <?php ActiveForm::end(); ?>

---

here is the stack trace:

PHP Warning 'yii\base\ErrorException' with message 'Invalid argument supplied for foreach()' 

in /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/helpers/BaseHtml.php:1602

Stack trace:
#0 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/helpers/BaseHtml.php(1602): yii\base\ErrorHandler->handleError(2, 'Invalid argumen...', '/Applications/A...', 1602, Array)
#1 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/helpers/BaseHtml.php(757): yii\helpers\BaseHtml::renderSelectOptions('12', NULL, Array)
#2 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/helpers/BaseHtml.php(1562): yii\helpers\BaseHtml::dropDownList('Instructions[0]...', '12', NULL, Array)
#3 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/helpers/BaseHtml.php(1411): yii\helpers\BaseHtml::activeListInput('dropDownList', Object(backend\models\Instructions), '[0]course_id', NULL, Array)
#4 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/widgets/ActiveField.php(580): yii\helpers\BaseHtml::activeDropDownList(Object(backend\models\Instructions), '[0]course_id', NULL, Array)
#5 /Applications/AMPPS/www/pgserver2015/backend/views/instructions/userform.php(25): yii\widgets\ActiveField->dropDownList(NULL, Array)
#6 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/View.php(325): require('/Applications/A...')
#7 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/View.php(247): yii\base\View->renderPhpFile('/Applications/A...', Array)
#8 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/web/View.php(210): yii\base\View->renderFile('/Applications/A...', Array, Object(backend\controllers\InstructionsController))
#9 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/web/Controller.php(47): yii\web\View->renderAjax('userform', Array, Object(backend\controllers\InstructionsController))
#10 /Applications/AMPPS/www/pgserver2015/backend/controllers/InstructionsController.php(161): yii\web\Controller->renderAjax('userform', Array)
#11 [internal function]: backend\controllers\InstructionsController->actionAddmore()
#12 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/InlineAction.php(55): call_user_func_array(Array, Array)
#13 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/Controller.php(151): yii\base\InlineAction->runWithParams(Array)
#14 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/Module.php(455): yii\base\Controller->runAction('addmore', Array)
#15 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/web/Application.php(83): yii\base\Module->runAction('instructions/ad...', Array)
#16 /Applications/AMPPS/www/pgserver2015/vendor/yiisoft/yii2/base/Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#17 /Applications/AMPPS/www/pgserver2015/backend/web/index.php(18): yii\base\Application->run()
#18 {main}

[usualdesigner]

These code looks horrible. Use code tags pls.

[fernandezekiel]

good lord

[mdmunir]

First, read this https://guides.github.com/features/mastering-markdown/ before posting. Second, i am not sure about your issue content (isn't readable for me). But, if you want to asking, use Yii forum or Yii FB Page

[ianfranco1986]

And nobody answer ...

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