Yii2 - dynamically switch rules set in model - ajax

Question

I want to dynamically substitute rules in model according to switch value on form.
In view:
<?php
$form = ActiveForm::begin([
'enableAjaxValidation' => true,
'validationUrl' => Url::toRoute('anounce/validation')
]);
?>
In controller:
public function actionValidation()
{
$model = new Anounce();
if (Yii::$app->request->isAjax && $model->load(Yii::$app->
request->post())) {
Yii::$app->response->format = 'json';
return ActiveForm::validate($model);
}
}
Excerpts from model:
class Anounce extends \yii\db\ActiveRecord
{
private $currentRuleSet; // Current validation set
// Here are arrays of rules with assignment
private $fullRuleSet; // = [...];
private $shortRuleSet; // = [...];
private $minRuleSet; // = [...];
public function init()
{
parent::init();
$this->currentRuleSet = $this->fullRuleSet;
}
public function rules()
{
return $this->currentRuleSet;
}
public function beforeValidate()
{
if ($this->idanounce_type === self::FULL) {
$this->currentRuleSet = $this->fullRuleSet;
} else if ($this->idanounce_type === self::SHORTER) {
$this->currentRuleSet = $this->shortRuleSet;
} else if ($this->idanounce_type === self::MINIMAL) {
$this->currentRuleSet = $this->minRuleSet;
}
return parent::beforeValidate();
}
}
Variable idanounce_type is a switch between rules.
Unfortunately, validation made according to full rules set (or rules set used in init), despite on which *RuleSet value assigned to currentRuleSet.
How to write dynamic switching of rules?

Answer 1

What you want here is to change validation according to the user's input. You can do this by defining scenarios in your model.
So firstly set scenarios where you put in it the fields that are to be validated. Example if you have username, password, and email fields, and you defined two scenarios, in SCENARIO_FIRST only username and password will get validated.
public function scenarios()
{
return [
self::SCENARIO_FIRST => ['username', 'password'],
self::SCENARIO_SECOND => ['username', 'email', 'password'],
];
}
Then in your controller, set the scenario according to the input:
public function actionValidation()
{
$model = new Anounce();
//example
if($condition == true)
{
$model->scenario = Anounce::SCENARIO_FIRST;
}
if (Yii::$app->request->isAjax && $model->load(Yii::$app->
request->post())) {
Yii::$app->response->format = 'json';
return ActiveForm::validate($model);
}
}
Read more about scenarios here and how to use them with validation here:
http://www.yiiframework.com/doc-2.0/guide-structure-models.html#scenarios