guild/backend/modules/task/views/task-user/view.php

<?php

use yii\helpers\ArrayHelper;
use yii\helpers\Html;
use yii\widgets\DetailView;

/* @var $this yii\web\View */
/* @var $model backend\modules\task\models\TaskUser */

$this->title = 'Изменить назначение сотрудника';
$this->params['breadcrumbs'][] = ['label' => 'Task Users', 'url' => ['index']];
$this->params['breadcrumbs'][] = $this->title;
\yii\web\YiiAsset::register($this);
?>
<div class="task-user-view">

    <p>
        <?= Html::a('Список', ['index', 'id' => $model->id], ['class' => 'btn btn-primary']) ?>
        <?= Html::a('Изменить', ['update', 'id' => $model->id], ['class' => 'btn btn-primary']) ?>
        <?= Html::a('Удалить', ['delete', 'id' => $model->id], [
            'class' => 'btn btn-danger',
            'data' => [
                'confirm' => 'Are you sure you want to delete this item?',
                'method' => 'post',
            ],
        ]) ?>
    </p>

    <?= DetailView::widget([
        'model' => $model,
        'attributes' => [
            'id',
            [
                'attribute' => 'task_id',
                'value' => ArrayHelper::getValue($model, 'task.title'),
            ],
            [
                'attribute' => 'project_user_id',
                'value' => ArrayHelper::getValue($model, 'projectUser.user.username'),
            ],
        ],
    ]) ?>

</div>