attachment--<%= blob.filename.extension %>">
<% if blob.representable? %>
<%= image_tag blob.representation(resize_to_limit: local_assigns[:in_gallery] ? [ 800, 600 ] : [ 1024, 768 ]) %>
<% end %>
<% if caption = blob.try(:caption) %>
<%= caption %>
<% else %>
<%= blob.filename %>
<%= number_to_human_size blob.byte_size %>
<% end %>