Yii2: Use hasOne relation Model on form return error

[mootensai]

What steps will reproduce the problem?

I have model like this

namespace frontend\models;
class User extends \yii\db\ActiveRecord{
    /**
     * @return \yii\db\ActiveQuery
     */
    public function getAgent()
    {
        return $this->hasOne(\frontend\models\Agent::className(), ['user_id' => 'id']);
    }
}

and when I use this

/* @var $model frontend\models\User */
    <?= $form->field($model->getAgent()->one(), 'name')->textInput(['placeholder' => 'Name']) ?>

What is the expected result?

ActiveForm could use the hasOne Model to model requirement

What do you get instead?

generates error

Error: Call to a member function formName() on null in D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\helpers\BaseHtml.php:2113
Stack trace:
#0 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\helpers\BaseHtml.php(1242): yii\helpers\BaseHtml::getInputName(NULL, 'id')
#1 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\helpers\BaseHtml.php(1292): yii\helpers\BaseHtml::activeInput('text', NULL, 'id', Array)
#2 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\widgets\ActiveField.php(362): yii\helpers\BaseHtml::activeTextInput(NULL, 'id', Array)
#3 D:\xampp\htdocs\test-rel-trait\frontend\views\user\_form.php(32): yii\widgets\ActiveField->textInput(Array)
#4 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(325): require('D:\\xampp\\htdocs...')
#5 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(247): yii\base\View->renderPhpFile('D:\\xampp\\htdocs...', Array)
#6 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(149): yii\base\View->renderFile('D:\\xampp\\htdocs...', Array, NULL)
#7 D:\xampp\htdocs\test-rel-trait\frontend\views\user\create.php(19): yii\base\View->render('_form', Array)
#8 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(325): require('D:\\xampp\\htdocs...')
#9 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(247): yii\base\View->renderPhpFile('D:\\xampp\\htdocs...', Array)
#10 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\View.php(149): yii\base\View->renderFile('D:\\xampp\\htdocs...', Array, Object(frontend\controllers\UserController))
#11 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\Controller.php(378): yii\base\View->render('create', Array, Object(frontend\controllers\UserController))
#12 D:\xampp\htdocs\test-rel-trait\frontend\controllers\UserController.php(89): yii\base\Controller->render('create', Array)
#13 [internal function]: frontend\controllers\UserController->actionCreate()
#14 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\InlineAction.php(55): call_user_func_array(Array, Array)
#15 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\Controller.php(154): yii\base\InlineAction->runWithParams(Array)
#16 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\Module.php(454): yii\base\Controller->runAction('create', Array)
#17 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\web\Application.php(84): yii\base\Module->runAction('user/create', Array)
#18 D:\xampp\htdocs\test-rel-trait\vendor\yiisoft\yii2\base\Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#19 D:\xampp\htdocs\test-rel-trait\frontend\web\index.php(18): yii\base\Application->run()
#20 {main}
2016-06-07 08:20:44 [::1][1][uqb0bhumv1mlind24cajj4dfj2][info][application] $_GET = [
    'r' => 'user/create'
]

Additional info

| Q | A |
| --- | --- |
| Yii version | 2.0.8 |
| PHP version | 7.0.4 |
| Operating system | Win 10 Pro x64 |

[samdark]

It's expected and documented. It should be used as $model->agent.

[mootensai]

I've tried $model->agent too, it still not work..
When I var_dump($model->agent) it returns null because the model is new.

[samdark]

What do you mean by new? Model wasn't saved yet? If yes, how should it get relations at all?

[mootensai]

OK, then I'm wrong..Thank you for your time..

[cesarhfborges]

very trash yii2, best speed, poor structure