Cannot use nested routes create - ruby-on-rails

Question

Struggling to get the create working for my nested routes in the following controller:
class BooksController < ApplicationController
before_action :set_book, only: [:show, :edit, :update, :destroy]
before_filter :load_author
# GET /books
# GET /books.json
def index
#books = #author.books.all
end
# GET /books/1
# GET /books/1.json
def show
end
# GET /books/new
def new
#book = #author.books.new
end
# GET /books/1/edit
def edit
end
# POST /books
# POST /books.json
def create
#book = #auhtor.books.new(book_params)
respond_to do |format|
if #book.save
format.html { redirect_to [#parent, #child], notice: 'Book was successfully created.' }
format.json { render :show, status: :created, location: #book }
else
format.html { render :new }
format.json { render json: #book.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /books/1
# PATCH/PUT /books/1.json
def update
respond_to do |format|
if #book.update(book_params)
format.html { redirect_to #book, notice: 'Book was successfully updated.' }
format.json { render :show, status: :ok, location: #book }
else
format.html { render :edit }
format.json { render json: #book.errors, status: :unprocessable_entity }
end
end
end
# DELETE /books/1
# DELETE /books/1.json
def destroy
#book.destroy
respond_to do |format|
format.html { redirect_to books_url, notice: 'Book was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_book
#book = Book.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def book_params
params.require(:book).permit(:name, :author_id)
end
def load_author
#author = Author.find(params[:author_id])
end
end
I am getting the following error on line #29:
undefined method `books' for nil:NilClass
Any ideas? It correctly populates the author_id field in the create view but when i click save I get this error.

Answer 1

I'm sure you will laugh out loud after getting solution of the issue.
You have MIS-SPELLED instance object as #auhtor. It should be #author in first line of create action.
#book = #author.books.new(book_params)