Why Controller names are plural but application_controller is itself a singular.

I was just curious when i scaffold a person and rails generated a people_controller for it, I was impressed but then I saw application_controller and it is singular. Does it has an explanation or it is as it is ?

CodePudding user response：

Rails is full of conventions and plural names for controllers is simply one of those conventions. It is so Rails can locate the appropriate controller when you put resources :books in your routes.rb

You can override the convention and specify the controller explicitly, resources :books, controller: "library". In this case, Rails will look for LibraryController.

With ApplicationController, you don't call it directly and Rails doesn't need to do this lookup and so it can be named whatever. You can rename it, for example.