Django. Django-mptt. Displaying checkboxes for categories, which have articles

template.html

<!-- With bootstrap accordeon for category's children -->
<ul class="categories">

    <li>
        <form id="all_categories_form" action="{{ url('articles:home') }}" method="get">
            <input type="hidden" name="is_clear" value="True">
            <a href="#" onclick="document.getElementById('all_categories_form').submit();">All</a>
        </form>
    </li>

    {% cache 150 "categories_tree" %}
        <form action="" method="get" class="form-group">
            {% for node in categories recursive %}
                {% set node_children = node.get_children() %}
                {% if node.has_articles %}  {# using to hide child categories, which have no articles #}
                    <li>
                        {% if node_children %}
                            <a class="category-dropdown" id="{{ node.id }}" type="button"
                               data-toggle="collapse" data-target="#category-{{ node.id }}">
                                <span class="glyphicon glyphicon-chevron-right"></span>
                            </a>&nbsp;
                        {% endif %}
                        <input class="category-checkbox" id="category-check-{{ node.id }}"
                               type="checkbox" name="categories" value="{{ node.id }}">&nbsp;
                        <a
                            {% if category %}
                                {% if node.slug == category.slug %}
                                    class="selected"
                                {% endif %}
                            {% endif %} href="{{ node.get_absolute_url() }}" >
                            {{ node.name }}
                        </a>
                    </li>
                {% endif %}
                {% if node_children %}
                    <div id="category-{{ node.id }}" class="collapse">
                        <ul class="children child-categories">
                            {{ loop(node_children) }}
                        </ul>
                    </div>
                {% endif %}
            {% endfor %}
            <button class="btn btn-success btn-category-search" type="submit">Find several categories</button>
        </form>
    {% endcache %}
</ul>

views.py

# Query
categories = Category.objects.exclude(articles__isnull=True).select_related('parent')\
            .prefetch_related('translations').distinct()  # get_cached_trees returns only root nodes, so children, which have articles,
                                                          # but their parents are not, displaying not correctly 
  
# get checked categories and filter categories by them
filter_cat_ids = self.request.GET.getlist('categories')
if filter_cat_ids:
    filter_categories = Category.objects.filter(id__in=filter_cat_ids).prefetch_related('translations')
    if filter_categories:
        articles = Article.objects.get_published()\
            .filter(categories__in=filter_categories.get_descendants(include_self=True))\
            .prefetch_related('translations', 'categories', 'images').distinct()
        context['articles'] = articles