Validate unique field using Ajax, Yii2 ActiveForm

Question

I am new to Yii, and cannot figure out how ajax validation works with ActiveForm. In my model I have unique field:

public function rules()
    {
        return [
             //...
            [['end_date'], 'unique'], //ajax is not working 

            [   'end_date', //ajax is working
                'compare',
                'compareAttribute'=>'start_date',
                'operator'=>'>=',  
                'skipOnEmpty'=>true,
                'message'=>'{attribute} must be greater or equal to "{compareValue}".'
            ],
        ];
    }

The compare rule is validated with ajax and works fine, but unique is not. I tried to enable ajax validation on form:

  <?php $form = ActiveForm::begin( ['id' => 'routingForm', 'enableClientValidation' => true, 'enableAjaxValidation' => true]); ?>

But don't know what to do next.

Controller:

public function actionCreate()
{
    $model = new Routing();
    $cities = [];     
    if ($model->load(Yii::$app->request->post()) && $model->save()) {            
        return $this->redirect(['index']);
    } else {
        return $this->renderAjax('create', [
            'model' => $model,
            'cities' => $cities
        ]);
    }
}

I know I could make ajax call to controller on end_date change event and form submit, but not sure how make all appropriate css to show the errors.

show your controller code please...

Double H
– Double H

2015-12-24 04:36:07 +00:00
Commented Dec 24, 2015 at 4:36 — Double H
– Double H, Commented Dec 24, 2015 at 4:36
Just read the official docs, it's covered here.

arogachev
– arogachev

2015-12-24 04:47:30 +00:00
Commented Dec 24, 2015 at 4:47 — arogachev
– arogachev, Commented Dec 24, 2015 at 4:47

GAMITG · Accepted Answer · 2015-12-24 04:40:05Z

1

You need to use Yii::$app->request->isAjax in controller.

public function actionCreate()
{
    if (Yii::$app->request->isAjax && $model->load(Yii::$app->request->post())) {
        Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
        return ActiveForm::validate($model);
      }
   if ($model->load(Yii::$app->request->post()) && $model->save()) {
       return $this->redirect(['index']);
    } else {
        return $this->renderAjax('create', [
          'model' => $model,
          'cities' => $cities
        ]);
}
}

answered Dec 24, 2015 at 4:40

GAMITG

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Comments

Double H · Accepted Answer · 2015-12-24 04:42:51Z

1

Try this code in your controller...

public function actionCreate()
{
    $model = new Routing();
    $cities = []; 

    if(Yii::$app->request->isAjax){
        $model->load(Yii::$app->request->post());
        return Json::encode(\yii\widgets\ActiveForm::validate($model));
    }

    if ($model->load(Yii::$app->request->post()) && $model->save())  {            
        return $this->redirect(['index']);
   } else {
    return $this->renderAjax('create', [
        'model' => $model,
        'cities' => $cities
    ]);
}
}

answered Dec 24, 2015 at 4:42

Double H

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1 Comment

arogachev Over a year ago

You should not use Json::encode , either change response format on the fly or use ContentNegotiator.

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