Add a white list of extensions which are allowed to be uploaded. For images you might use something like this:
# File lib/templates/file_uploader.rb, line 37 def extension_white_list [:xls] end
Override the directory where uploaded files will be stored. This is a sensible default for uploaders that are meant to be mounted:
# File lib/templates/file_uploader.rb, line 14 def store_dir "#{::Rails.root.to_s}/public/excel_uploaded_files/" end