Yii2 validation in separate actions for render and post form - php

Question

I have tried different approach for create action.
Usually i have one action which renders, validates and saves data.
Now i want two separate actions. One for rendering view and second for validation and data storage.
View
$form = ActiveForm::begin([
'action' => ['ew/eshop-create'],
'method' => 'post',
]);
echo $form->field($model, 'input')->textarea([
'rows' => '20'
]);
echo Html::submitButton(
'<i class="glyphicon glyphicon-send"></i> Odoslať',
[
'class' => 'btn btn-success',
'name' => 'create-button'
]
);
ActiveForm::end();
Model
class EshopCreate extends Model
{
public $input;
public function attributeLabels()
{
return [
'input' => 'JSON vstup'
];
}
public function rules()
{
return [
['input', 'required'],
['input', 'validateInput'],
];
}
public function validateInput()
{
// validate json
$this->addError('input', 'Something is wrong');
}
}
Controller
class EwController extends Controller
{
public function actionEshopCreateForm()
{
$model = new EshopCreate();
return $this->render('eshop-create-form', [
'model' => $model
]);
}
public function actionEshopCreate()
{
$model = new EshopCreate();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
exit('create');
}
return $this->redirect(['ew/eshop-create-form']);
}
}
Edit:
So i had problem with validation. I switched model->load and model->validate in actionEshopCreate.
So it works fine, but message from validateInput is not displayed. Also when i turn off clientvalidation, there are no error messages at all. So my question is how to pass errors from one action to another.
Thanks.

Answer 1

You are redirecting to a different action when the form is submitted and fail to pass the validation
return $this->redirect(['ew/eshop-create-form']);
the EshopCreate model will lose all validation messages when the redirection happens
Probably you want to do something like this
class EwController extends Controller
{
public function actionEshopCreateForm()
{
$model = new EshopCreate();
return $this->render('eshop-create-form', [
'model' => $model
]);
}
public function actionEshopCreate()
{
$model = new EshopCreate();
if ($model->load(Yii::$app->request->post()) && $model->validate())
{
//store the model data in session or somewhere for example where you can retrieve it later in the actionEshopCreateForm() action
return $this->redirect(['ew/eshop-create-form']);
}
return $this->render('eshop-create-form', [
'model' => $model
]);
}
}