在yii2中显示两个模型项作为无线电列表，其中用户不能同时选择两个

Question

I have a model having two items : is_normal and is_transporter

I would like to show both in an active form as radio list but i havent figured out how

This is the model:

 public function rules()
{
    return [
        [['reg_no', 'truck_category', 'added_by', 'truck_status', 'driver_name'], 'required'],
        [['truck_category', 'added_by', 'truck_status', 'is_normal', 'is_transporter'], 'integer'],
        [['added_on'], 'safe'],
        [['reg_no'], 'string', 'max' => 50],
        [['driver_name'], 'string', 'max' => 100],
        [['truck_category'], 'exist', 'skipOnError' => true, 'targetClass' => TblChecklistCategory::className(), 'targetAttribute' => ['truck_category' => 'id']],
        [['added_by'], 'exist', 'skipOnError' => true, 'targetClass' => User::className(), 'targetAttribute' => ['added_by' => 'id']],
        [['truck_status'], 'exist', 'skipOnError' => true, 'targetClass' => TblTruckStatus::className(), 'targetAttribute' => ['truck_status' => 'id']],
    ];
}

How can i use the two model attributes in active form as a radiolist

Answer 1

I would avoid having two attributes for this when one is enough but if you really need this here is the answer.

Prepare virtual attribute in the model to handle the radio button.

/**
 * @var boolean
 */
public $normal_or_transporter;

You need to add it in the rules:

public function rules()
{
    return [
        // ...
        [['reg_no', 'truck_category', 'added_by', 'truck_status', 'driver_name', 'normal_or_transporter'], 'required'],
        ['normal_or_transporter', 'boolean'],
    ];
}

Now in the form view add this field (assuming standard ActiveForm widget):

<?= $form->field($model, 'normal_or_transporter')->radioList([
    0 => 'Normal truck',
    1 => 'Transporter'
]) ?>

Final step is to handle the virtual attribute. You can do it in the model again. We can use beforeSave() because is_normal and is_transporter are not in the required rule so validation pass without them being set.

public function beforeSave($insert)
{
    if (parent::beforeSave($insert)) {
        $this->is_normal = 0;
        $this->is_transporter = 0;
        if ($this->normal_or_transporter) {
            $this->is_transporter = 1;
        } else {
            $this->is_normal = 1;
        }
        return true;
    }
    return false;
}