routes.rb

resources :books

# is short hand for:

get    'books'          => 'books#index'    #as => 'books'
post   'books'          => 'books#create'   #as => 'books'
get    'books/new'      => 'books#new',     :as => 'new_book'
get    'books/:id/edit' => 'books#edit',    :as => 'edit_book'
get    'books/:id'      => 'books#show',    :as => 'book'
patch  'books/:id'      => 'books#update'   #as => 'book'
put    'books/:id'      => 'books#update'   #as => 'book'
delete 'books/:id'      => 'books#destroy'  #as => 'book'

# both generate the exact same routes:

#    Prefix Verb   URI Pattern               Controller#Action
#     books GET    /books(.:format)          books#index
#         " POST   /books(.:format)          books#create
#  new_book GET    /books/new(.:format)      books#new
# edit_book GET    /books/:id/edit(.:format) books#edit
#      book GET    /books/:id(.:format)      books#show
#         " PATCH  /books/:id(.:format)      books#update
#         " PUT    /books/:id(.:format)      books#update
#         " DELETE /books/:id(.:format)      books#destroy