Hi, I wanted to understand the current model better so I've generated ER diagram from Scott's PR https://github.com/theforeman/staypuft/pull/12. see http://projects.theforeman.org/projects/ofi/wiki/DB_Model How to: add `gem 'rails-erd'` and execute `rake erd only='Staypuft::Deployment,Staypuft::DeploymentHostgroup,Staypuft::HostgroupRole,Staypuft::Layout,Staypuft::LayoutRole,Staypuft::Role,Staypuft::RoleClass,Staypuft::RoleService,Staypuft::Service,Staypuft::ServiceClass,Hostgroup,Puppetclass' attributes='foreign_keys,content' orientation=vertical filetype=dot` then `dot -Tsvg erd.dot > erd.svg` Petr