panel/app/views/posts/_new_related_post.haml

:ruby
  image = nil
  description = nil

  if post.post.attribute?(:image) && (image = post.post.image.static_file)
    description = post.post.image.value['description']
  end

.col.mb-3
  = render('bootstrap/card', image: image, description: description, title: post.title, class: 'h-100') do
    - if post.post.attribute?(:description)
      %p.card-text= post.post.description.value

    = link_to 'Editar', post.path, class: 'btn btn-secondary'