_thumbnail.html.erb

<% begin %>
<%# NOTE: This is superficially similar to the logic in DraftItem#thumbnail, but this file is run against
every file attached to an item via a JS callback rendering files/update_files_list.js.erb calling _files_list.html.erb
whereas DraftItem#thumbnail specifically only deals with rendering the designated file for representing it as a
thumbnail and is used on various other pages, like profiles, which use the application/_thumbnail partial.%>
  <% thumbnail = rails_representation_path(file.variant(resize: '100x100', auto_orient: true).processed) %>
  <%= safe_thumbnail_tag(thumbnail, alt: '', title: file.filename, size: '100x100') %>
<% rescue  ActiveStorage::InvariableError %>
  <% begin %>
      <% thumbnail = rails_representation_path(file.preview(resize: '100x100', auto_orient: true).processed) %>
      <%= safe_thumbnail_tag(thumbnail, alt: '', title: file.filename, size: '100x100') %>
  <% rescue ActiveStorage::UnpreviewableError %>
    <div class="text-muted text-center img-thumbnail p-3">
      <%= icon('far', file_icon(file.content_type), class: 'fa-5x') %>
      <span class="sr-only"><%= file.filename %></span>
    </div>
  <% end %>
<% end %>