Yii2 display data after join - yii2

Question

I have joined 2 table, now I want to show the name of categories in field <th>Categories name</th>. How can I do that with <?php foreach ($posts as $post){ ?> ? Do i render like <?=$post->categories.name?> ? I'm stuck here.
Thank you.
My controller:
public function actionIndex()
{
$query = posts::find()->leftJoin('categories', 'posts.cate_id = categories.id');
$cates = Categories::find()->all();
$posts= $query->orderBy(['create_date' => SORT_DESC])->all();
$images = Images::find()->all();
$searchModel = new PostsSearch();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
return $this->render('index', [
'posts' => $posts,
'dataProvider' => $dataProvider,
'searchModel' => $searchModel,
'cates' => $cates,
'images' => $images,
]);
}
My view:
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>Create Date</th>
</thead>
<tbody>
<?php foreach ($posts as $post){ ?>
<tr>
<td><?= $post->id ?></td>
<th><?= Html::a($post->name, ['post/view', 'id'=>$post->id]) ?></th>
<td><?= $post->create_date ?></td>
</tr>
<?php } ?>
</tbody>

Answer 1

Loop through the categories just as with posts. Its the same principle.
foreach($posts as $post)
foreach($post->categories as $category)
echo $category->name;
This is based on the assumption you have defined the proper relations in the model.
I.e. through foreign key:
public function getCategories()
{
return $this->hasMany(Category::className(), ['post_id' => 'id']);
}
You seem to have it the other way around. You can have category_id in post, but then its limited to one category. Unless, you store the ids in the field seperated by a delimeter. But that option requires a bit more work.