Action

One of the seven derived routes, named by its role rather than by its method and path.

Index is "list them all", New is "give me a blank form", Create is "accept that form". The method and the path fall out of the name. Roles are what make subtraction readable — Actions.except(Destroy) says "no deleting", which is what a user means, rather than "no DELETE /widgets/:id" — and they are what the orphan warning says back, since Edit without Update is a form page whose submit target answers 405, and "mount Update, or subtract Edit as well" names the line a user edits rather than the route that failed. #118 put the check itself over the assembled route table rather than over an Actions, since the 405 is a property of the application and not of one model.

Declaration order is emission order, and it is a hard constraint rather than a preference: GET /widgets/new has to be emitted before GET /widgets/:id, or first-match dispatch sends /widgets/new to show, which then fails to read new as a key and answers 400 instead of rendering the form.