test

.rspec

@@ -1,2 +1,2 @@
 --colour
---format=d
+--format=d

app/controllers/books_controller.rb

@@ -16,6 +16,9 @@ def index
   # GET /books/1
   # GET /books/1.json
   def show
+    @book = Book.find(params[:id])
+    @memo = @book.memos.build
+
     respond_to do |format|
       format.html # show.html.erb
       format.xml { render xml: @book }

app/models/book.rb

@@ -1,5 +1,6 @@
 # encoding: UTF-8
 class Book < ActiveRecord::Base
+  has_many :memos
   attr_accessible :memo, :purchased_on, :title
   validates :title, :presence => true
 

app/views/books/show.html.erb

@@ -15,6 +15,7 @@
   <%= @book.purchased_on %>
 </p>
 
+<%= render 'memos/index' %>
+<%= render 'memos/form' %>
 
-<%= link_to 'Edit', edit_book_path(@book) %> |
 <%= link_to 'Back', books_path %>

config/routes.rb

@@ -1,5 +1,7 @@
 BookMemo2::Application.routes.draw do
-  resources :books
+  resources :books do
+    resources :memos
+  end
 
   # The priority is based upon order of creation:
   # first created -> highest priority.

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120526050801) do
+ActiveRecord::Schema.define(:version => 20120627131716) do
 
   create_table "books", :force => true do |t|
     t.string   "title"
@@ -21,4 +21,11 @@
     t.datetime "updated_at",   :null => false
   end
 
+  create_table "memos", :force => true do |t|
+    t.integer  "book_id"
+    t.text     "memo"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+  end
+
 end

spec/models/book_spec.rb

@@ -2,6 +2,11 @@
 require 'spec_helper'
 
 describe Book do
+  it 'タイトルが未入力の場合はエラー' do
+    book = Book.new
+    book.valid?.should be_false
+  end
+
   describe 'validation' do
     describe 'title' do
       subject { Book.new.valid? }