- <object data="<%= url_for(controller: 'collections', action: 'show_file', uuid: ua.uuid, file: "#{file[0]}/#{file[1]}") %>" type="<%= Rack::Mime::MIME_TYPES[file[1]] || 'application/pdf' %>" width="100%" height="400px">
+ <object data="<%= url_for(controller: 'collections', action: 'show_file', uuid: ua.uuid, file: "#{file[0]}/#{file[1]}") %>" type="<%= Rack::Mime::MIME_TYPES[file[1].match(/\.\w+$/)[0]] rescue '' %>" width="100%" height="400px">