Can't draw related model data, get invalid foreach argument - php

Question

Attempting to recast a Yii 1.1 application in Yii2 advanced template, and stumbling on the display of related model data in a view.
Have searched for answers regarding this but as far as I can tell, I'm following Yii2 protocols for gathering the data, and other extended examples I've seen have all been related to e.g. GridView
Relevant Model code:
frontend/config/main.php
return [
...
'components' => [
...
'urlManager' => [
'enablePrettyUrl' => true,
'showScriptName' => false,
'rules'=> [
'home' => 'page/home',
'<alias:about>' => 'page/page',
'page/<alias>' => 'page/page'
],
],
common/models/Page.php
namespace common\models;
use Yii;
/**
* This is the model class for table "page".
...
* The followings are the available model relations:
* #property Content[] $contents
*/
class Page extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'page';
}
...
public function getContents()
{
return $this->hasMany(Content::className(), ['pageId' => 'id']);
}
...
models/common/Content.php
namespace common\models;
use Yii;
/**
* This is the model class for table "content".
...
* The followings are the available model relations:
* #property Page $page
*/
class Content extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public static function tableName()
{
return 'content';
}
...
public function rules()
{
return [
[['name', 'slug', 'pageId', 'content'], 'required'],
[['pageId'], 'integer'],
[['content'], 'string'],
[['name', 'slug'], 'string', 'max' => 255],
[['pageId'], 'exist', 'skipOnError' => true, 'targetClass' => Page::className(), 'targetAttribute' => ['pageId' => 'id']],
];
}
...
public function getPage()
{
return $this->hasOne(Page::className(), ['id' => 'pageId']);
}
frontend/controllers/PageController.php
class PageController extends Controller
{
...
public function actionPage($alias)
{
$model=$this->loadContent($alias);
if ($alias == "home")
{
$news=$this->loadRecentNews();
}
$this->render('default',[
'model'=>$model,
'news'=>$news
]);
}
...
public function loadContent($page)
{
$pageModel = Page::find()->where(['slug'=>$page])->with('contents')->all();
if($pageModel===null)
throw new CHttpException(404,'The requested Page could not be found.');
return $pageModel;
}
public function loadRecentNews()
{
$newsModel = News::find()->orderBy('create_time DESC')->limit(2)->all();
return $newsModel;
}
frontend/views/page/default.php (portion that fails)
<?php foreach ($model->contents as $content) { ?>
<h3><?php echo $content->name; ?></h3>
<?php echo $content->content; ?>
<?php } ?>