<% attachment=attachment_new %> <% data_ext = attachment.datei.file.try(:extension).try(:downcase) %> <% if (!["jpg","png","jpeg"].find_index(data_ext).nil?) %> <%= image_tag attachment.datei.thumb_small.url %> <% elsif (!["pdf"].find_index(data_ext).nil?)%> <%= image_tag attachment.datei.cover.url %> <% else %> <%= ff_icon("ffi1-note20 fa-2x") %> <% end %> <%= attachment.name %>