Rails 4 Standard CRUD Controller

books_controller.rb

# This is a fairly basic / bare controller which does only the basic CRUD.
class BooksController < ApplicationController
  before_action :set_book, only: [:show, :edit, :update, :destroy]

  def index
    respond_with @books = Book.all
  end

  def show
    respond_with @book
  end

  def new
    respond_with @book = Book.new
  end

  def edit
    respond_with @book
  end

  def create
    respond_with @book = Book.create(book_params)
  end

  def update
    @book.update(book_params)

    respond_with @book
  end

  def destroy
    # Destroy returns the object (i.e. self); though I believe Mongoid returns a boolean - need to double check this
    @book.destroy
    
    respond_with @book.destroy
  end

  private

  def set_book
    @book = Book.find(params[:id])
  end

  def book_params
    params.require(:title, :price)
    params.permit(:title, :isbn, :price)
  end
end