_show.html.haml

.comments
  - commentable.comments.without_parent.each do |comment|
    = render partial: 'webui2/webui/comment/content', locals: { comment: comment, commentable: commentable, level: 1 }

  .comment_new
    = render partial: 'webui2/webui/comment/new', locals: { commentable: commentable }

:javascript
  $(document).ready(function() {
    $('#comments img').one('error', function() {
      $(this).after('<i class="fas fa-user-circle fa-2x ' + $(this).attr('class') + '"></i>');
      $(this).remove();
    });
  });