How to realize a skinny controller

When you code ruby on rails, you might sometimes add new actions except for basic rails actions(index, new, create, show, edit, update, destroy). Ideally, you should use only 7 basic actions in a controller (by DHH). When I heard the claim for the first time, I was skeptical of it. However, basically you can realize the skinny controller by dividing it.

case study

If you are developing an application in which users can manage their books, you might use a controller like this.

BooksController < ApplicationController
def index
  @books = Book.all
end
def show 
  @book = Book.find(params[:id])
end
def publish #<= this 
end
def unpublish #<= this
end

In this case, you should add a new controller. That is below.

Books::PublicationsController <  ApplicationController
def update
end
def destroy
end

Instead of publish method, you can use update, moreover, you can use destroy instead of unpublish. The controller became skinny.

Routing is like this.

resources :books do
  resource :publication, only: [:update, :destroy], module: "books"
end

Started LinkedIn as well!

https://www.linkedin.com/in/tomoharu-tsutsumi-56051a126/