Yii2: how to remove required attribute in a view?

Question

I have a text field that was defined as required in its model. But a view needs not be required. I try this way to remove the required attribute but it doesn't work:

<?= $form->field($model, 'city')->textInput(['required' => false]) ?>

I need to change it in a view or in its controller. But not in its model (because others view needs the required attribute.).

I know how to do it using jQuery but I prefer with PHP/Yii2.

Update (requiered by the nice help of @Muhammad Omer Aslam):

• My model is called Persons.

• My view is called _form.

• My controller is called PersonsControllers. It has the update function:

actionUpdate($id):

public function actionUpdate($id)
{
    $model = $this->findModel($id); // How to add my new scenario here?

    if ($model->load(Yii::$app->request->post()) && $model->save()) {
        return $this->redirect(['view', 'id' => $model->id_person]);
    }

    return $this->render('update', [
        'model' => $model,
    ]);

}

Answer 1

You can use scenarios to make the field required or not for the specific view. You can assign the active fields that are required for the scenario, and those fields will be the subject to validation.

I assume the model is Profile. In below example firstname, lastname and city is required in the default scenario.

A model may be used in different scenarios, by default the scenario default is used. Let's say in your case we can declare a scenario special that will only require firstname and lastname. In your model, you will declare a constant for the scenario name, and then override the scenarios() method, key=>value pairs with the active field names being passed in form of an array to the value will be assigned.

namespace app\models;

use yii\db\ActiveRecord;

class Profile extends ActiveRecord
{
    const SCENARIO_SPECIAL = 'special';

    public function scenarios()
    {
        $scenarios = parent::scenarios();
        $scenarios[self::SCENARIO_SPECIAL] = ['firstname', 'lastname'];
        return $scenarios;
    }
}

and then inside your controller/action for that view where you do not want the city field to be required, initialize the Profile model object as below

public function actionProfile(){
    $model = new \common\models\Profile(['scenario'=> \common\models\Profile::SCENARIO_SPECIAL]);
    return $this->render('profile',['model'=>$model]);
}

Now if you submit the form inside this view it will ask only for the firstname and lastname whereas in your previous forms/views if you try to submit the form it will ask you to provide the city when trying to submit, you don't have to change or add anything for the rest of the forms or the rules.

---

As you are trying to update the record and do not want the city to be required when updating the record, the only difference that could be is to assign the scenario like below as you are not creating a new object for the model.

$model->scenario=\common\models\Profile::SCENARIO_SPECIAL;

Answer 2

In the model:

const SCENARIO_MYSPECIAL = 'myspecial';

public function rules()
{
    return [
        [['id_person', 'city'], 'required', 'on' => self::SCENARIO_DEFAULT], 
        [['id_person'], 'required', 'on' => self::SCENARIO_MYSPECIAL],
    ];
}

In the controller:

public function actionUpdate($id)
{
    $model = $this->findModel($id);
    $model->scenario = 'myspecial';

    if ($model->load(Yii::$app->request->post()) && $model->save()) {
        return $this->redirect(['view', 'id' => $model->id_person]);
    }

    return $this->render('update', [
        'model' => $model,
    ]);

}

Answer 3

go to the model and remove the attribute

public function rules()
{
    return [
        [['id_person', 'city'], 'required'], 
        [['id_person'], 'required'],
    ];
}

EX:

public function rules()
{
    return [
        [['id_person'], 'required'], 
        [['id_person'], 'required'],
    ];
}