来自特定 WordPress 类别的帖子未在 Timber/Twig for loop 中显示

Question

I am using the following code to output posts from three different categories. The posts from Canada and World are being displayed correctly, but nothing from United States. I have tried dumping var_dump($context['posts']); in the WordPress PHP file, which does return the posts from all of the categories including United States. When I use Timber's {{ dump(post) }} in the Twig template to dump {{ dump(posts.united-states) }} , the following is displayed int(0) . I have tried removing the hyphen from the category slug and updating the for loop , but this did not solve the issue.

Any ideas on what is causing this issue?

PHP code

$context = Timber::context();
$timber_post = new Timber\Post();

$query = array(
  // Canada, United States, and World categories
  'cat' => '3,4,6',
  'orderby' => 'title',
  'order' => 'ASC',
  'posts_per_page' => -1,
);

$posts = Timber::get_posts( $query );

$sorted_posts = array();

foreach ( $posts as $post ) {
  // Get first category of post
  $category = $post->category();

  // Fill post back to sorted_posts
  $sorted_posts[ $category->slug ][] = $post;
}

// Add sorted posts to context
$context['posts'] = $sorted_posts;

$context['post'] = $timber_post;
Timber::render( array( 'page-' . $timber_post->post_name . '.twig', 'page.twig' ), $context );

Twig template code

{% extends "base.twig" %}
{% block content %}
<section>
  <h2>Canada</h2>
  {% for story in posts.canada %}
    <article class="story" id="story-{{ story.ID }}">
    </article>
  {% endfor %}
</section>
<section>
  <h2>United States</h2>
  {{ dump(posts.united-states) }}
  {% for story in posts.united-states %}
    <article class="story" id="story-{{ story.ID }}">
    </article>
  {% endfor %}
</section>
<section>
  <h2>The World</h2>
  {% for story in posts.world %}
    <article class="story" id="story-{{ story.ID }}"> 
    </article>
  {% endfor %}
</section>
{% endblock %}

Answer 1

Have your tried accessing it with good old square brackets like below:

{{ dump(posts['united-states']) }}

Quick example: https://twigfiddle.com/pbqq14

Loop example:

{% for story in posts['united-states'] %}

{{story}}

{% endfor %}