I am creating application which requires User management of various levels for authorization of different level of users. I want several models: Admin_user Project Manager Company Clients Account : have many users of all level.Every user have account. See below the relations between our models: 1. Admin_user : have many project managers and can give rights to project manager.It can add and delete Project managers.Admin can access or manage any level of this application i.e. Its a SUPER USER. 2.Project manager : have many companies.It can create and delete many companies. Project Manager can also add new project manager if Admin_user give right to him to create new project manager.its all depends on Admin_user to give or take rights from PM. 3. Companies : can create and delete many client_users but cannot create any company in th same level.Company also start or stop rights of client. 4.Client :can have account login and use services provided by company nothing more than that. This is my model Association. But i m confused what can i make first a Account model or a Admin_user model. Thanks -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.