According to Roy Fieldingâ€™s doctoral thesis, we should use restful routes to represent the resource and its state. Use the default 9 actions without overusing route customizations.implemented
Some people will define 3 or more level nested routes, it's a kind of over design and not recommended.implemented
If you use RESTful design, you should NOT use default route. It will cause a security problem. I explain at http://ihower.tw/blog/archives/3265 too.implemented
the routes will become complicated with the growth of your application, contain different namespaces, each with a lot of resources and custom routes, it would be better to split routes into different files according to the namespaces, which makes it easy to maintain the complicated routes.
By default, Rails generates seven RESTful routes(new,edit,create,destroy,index,show, update) for a resource, sometime the resource only needs one or two routes, so just user :only or :except while defining routes to speedup the routing.implemented