https://kpumuk.info/ruby-on-rails/submitting-a-patch-to-the-open-source-project-composite_primary_keys/attachment/compositeprimarykeys/ In my blog I'll try to describe about interesting technologies, my discovery in IT and some useful things about programming. Mon, 07 Dec 2009 13:11:35 +0000 hourly 1 https://wordpress.org/?v=6.7.1