{% if entity.image %}
    {% set image = asset(entity.image.pathname) %}
{% else %}
    {% set image = asset('build/images/no-image.png') %}
{% endif %}

<img src="{{ asset('build/images/blank.png') }}" style="background: url({{ image }}) center center; background-size: cover" class="rounded float-left mr-2">

<a href="{{ path('admin_blog_post_show', {entity: entity.id}) }}" class="font-weight-bold text-body d-block">
    {{ entity.title }}
</a>

{% set categories = [] %}

{% for category in entity.categories %}
    {% set url = path('admin_blog_category_show', {entity: category.id}) %}
    {% set categories = categories|merge(['<a href="' ~ url ~ '">' ~ category.title ~ '</a>']) %}
{% endfor %}

Dans {{ categories|join(', ')|raw }}