ruby:
  <%= options[:attr_name] %>_blob_id: <%%= file_blob_id 'files/ruby.png' %>
  <%= options[:attr_name] %>_size: <%%= file_blob_size 'files/ruby.png' %>
  <%= options[:attr_name] %>_mime_type: image/png
  <%= options[:attr_name] %>_original_name: ruby.png

invoice:
  <%= options[:attr_name] %>_blob_id: <%%= file_blob_id 'files/invoice.pdf' %>
  <%= options[:attr_name] %>_size: <%%= file_blob_size 'files/invoice.pdf' %>
  <%= options[:attr_name] %>_mime_type: application/pdf
  <%= options[:attr_name] %>_original_name: invoice.pdf