yii2 - multiple rows load into same table from one form - yii2

Question

I am trying to save a schedule of working days on a table multiple rows at once...
I am doing this wrong, still giving me errors.
I have seen tabular inputs from others, but can't get this right.
I really need some other eyes on it.
I have a similar problem as https://phppedia.com/en/knowledge-base/32481399/yii2-insert-multiple-records-of-a-same-table
model:
public
function rules()
{
return [
['store_id', 'string'],
['day', 'string'],
['start_hour', 'string'],
['end_hour', 'string'],
['holiday','boolean'],
];
}
controler:
public function actionCreate()
{
$count = count(Yii::$app->request->post('Openhour', []));
$model = [new Openhours()];
for ($i = 1; $i < $count; $i++) {
$model[] = new Openhours();
}
if ($model->loadMultiple($model, Yii::$app->request->post())) {
foreach ($model as $model) {
$model->save(false);
}
}
return $this->render('create', ['model' => $model,]);
}
_form
<?php $stores = Stores::getAll() ?>
<?php foreach ($stores as $store): ?>
<?php if ($store->id !== 0): ?>
<?php $listData[$store->id] = [$store->id => $store->title]; ?>
<?php endif; ?>
<?php endforeach; ?>
<?php $form = ActiveForm::begin(['enableAjaxValidation' => true, 'options' => ['class' => 'model-form'],]); ?>
<?php foreach ($model as $index => $model): ?>
<div class="row row-cols-3">
<div class="col">
<h5>
<?php if ($store->title === Yii::$app->user->identity->username) : ?>
<?= $form->field($model, '[$index]store_id')->hiddenInput(['value' => $store->title])->label($store->title) ?>
<?php else: ?>
<?= $form->field($model, '[$index]store_id')->dropDownList($listData, ['prompt' => 'Select...']); ?>
<?php endif; ?>
</h5>
</div>
<div class="col">Opening</div>
<div class="col">Close</div>
</div>
<?php $days = Storedays::getAll() ?>
<?php foreach ($days as $day): ?>
<div class="row row-cols-3">
<div class="col">
<div class="row justify-content-between">
<div class="col">
<h6><?= $day->name ?></h6>
<?= $form->field($model, '[$index]day')->hiddenInput(['value' => $day->name, 'id' => 'day' . $day->id])->label(false) ?>
</div>
<div class="col">
<?= $form->field($model, '[$index]holiday')->checkbox(['selected' => $model->holiday, 'id' => 'holiday' . $day->id])->label(false) ?>
</div>
</div>
</div>
<div class="col">
<?= $form->field($model, '[$index]start_hour')->Input('text')->widget(TimePicker::class, ['options' => ['id' => 'start_hour' . $day->id], 'pluginOptions' => ['maxHours' => '8', 'template' => 'dropdown', 'showSeconds' => false, 'showMeridian' => false, 'minuteStep' => 15,]])->label(false) ?>
</div>
<div class="col">
<?= $form->field($model, '[$index]end_hour')->Input('text')->widget(TimePicker::class, ['options' => ['id' => 'end_hour' . $day->id], 'pluginOptions' => ['maxHours' => '8', 'template' => 'dropdown', 'showSeconds' => false, 'showMeridian' => false, 'minuteStep' => 15,]])->label(false) ?>
</div>
</div>
<?php endforeach; ?>
<?php if (IS_ROOT) : ?><?= $form->field($model, '[$index]slug') ?><?php endif; ?>
<?= Html::submitButton('save', ['class' => 'btn btn-primary']) ?>
<hr class="mb-3">
<?php endforeach; ?>
<?php ActiveForm::end(); ?>

Answer 1

First you have an array of objects and you must use plural name instead.
So model become models.
Second you must use functions for loading multiple models from request Model::loadMultiple($models) and for validate multiple models Model::validateMultiple($models).
Now in your controller:
public function actionCreate()
{
$count = count(Yii::$app->request->post('Openhour', []));
$models = [new Openhours()];
for ($i = 1; $i < $count; $i++) {
$models[] = new Openhours();
}
if (Model::loadMultiple($models, Yii::$app->request->post()) && Model::validateMultiple($models)) {
foreach ($models as $model) {
$model->save(false);
}
}
return $this->render('create', ['models' => $models]);
}
Now in your _form.php change the line:
<?php foreach ($model as $index => $model): ?>
To:
<?php foreach ($models as $index => $model): ?>