/**
* @return \yii\db\ActiveQuery
*/
public function getPoItems()
{
return $this->hasMany(PoItem::className(), ['po_id' => 'id']);
}
/**
* Updates an existing Po model.
* If update is successful, the browser will be redirected to the 'view' page.
* @param integer $id
* @return mixed
*/
public function actionUpdate($id)
{
$model = $this->findModel($id);
$modelsPoItem = $model->poItems;
if ($model->load(Yii::$app->request->post())) {
$oldIDs = ArrayHelper::map($modelsPoItem, 'id', 'id');
$modelsPoItem = Model::createMultiple(PoItem::className(), $modelsPoItem);
Model::loadMultiple($modelsPoItem, Yii::$app->request->post());
$deletedIDs = array_diff($oldIDs, array_filter(ArrayHelper::map($modelsPoItem, 'id', 'id')));
// validate all models
$valid = $model->validate();
$valid = Model::validateMultiple($modelsPoItem) && $valid;
if ($valid) {
$transaction = \Yii::$app->db->beginTransaction();
try {
if ($flag = $model->save(false)) {
if (!empty($deletedIDs)) {
PoItem::deleteAll(['id' => $deletedIDs]);
}
foreach ($modelsPoItem as $modelPoItem) {
$modelPoItem->po_id = $model->id;
if (!($flag = $modelPoItem->save(false))) {
$transaction->rollBack();
break;
}
}
}
if ($flag) {
$transaction->commit();
return $this->redirect(['view', 'id' => $model->id]);
}
} catch (Exception $e) {
$transaction->rollBack();
}
}
} else {
return $this->render('update', ['model' => $model, 'modelsPoItem' => empty($modelsPoItem) ? [new PoItem()] : $modelsPoItem]);
}
}