Barcode ... How can I generate it?

i suggest to take a look on JasperReports.
i think it's the best way to integrate reports, barcode and pdf
generation into your rails app.
as far as i know theres no satisfying way in rails.

http://jasperforge.org/ JasperReports / iReport (generate your reports
with a GUI)
http://jasperforge.org/sf/wiki/do/viewPage/projects.jasperreports/wiki/
Samples => barbecue sample for you

at least a starting point for the integration:
http://wiki.rubyonrails.com/rails/pages/HowtoIntegrateJasperReports

i took me a while to use it. so good luck. :slight_smile: