If you have created namespaced routes, form_for has a nifty shorthand for that too. If your application has an admin namespace then
form_for [:admin, @article]
will create a form that submits to the ArticlesController inside the admin namespace (submitting to admin_article_path(@article) in the case of an update). If you have several levels of namespacing then the syntax is similar:
form_for [:admin, :management, @article]