Mount API engine correctly

Gemfile

@@ -8,6 +8,8 @@ gem 'rails', '3.1.3'
 gem 'sqlite3'
 gem 'bcrypt-ruby'
 
+gem 'api', :path => './engines/api'
+
 # Gems used only for assets and not required
 # in production environments by default.
 group :assets do

Gemfile.lock

@@ -1,3 +1,9 @@
+PATH
+  remote: ./engines/api
+  specs:
+    api (0.0.1)
+      rails (~> 3.1.3)
+
 GEM
   remote: http://rubygems.org/
   specs:
@@ -110,6 +116,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  api!
   bcrypt-ruby
   coffee-rails (~> 3.1.1)
   jquery-rails

app/models/post.rb

@@ -1,3 +1,5 @@
 class Post < ActiveRecord::Base
   belongs_to :author, :class_name => "User"
+
+  validates :title, :presence => true
 end

config/routes.rb

@@ -1,6 +1,8 @@
 Blog::Application.routes.draw do
   resources :posts
 
+  mount Api::Engine => "/api"
+
   # The priority is based upon order of creation:
   # first created -> highest priority.