V2

app/controllers/api/v2/base_controller.rb

@@ -0,0 +1,15 @@
+class Api::V2::BaseController < ApplicationController
+  # disable the CSRF token
+  protect_from_forgery with: :null_session
+
+  # disable cookies (no set-cookies header in response)
+  before_action :destroy_session
+
+  # disable the CSRF token
+  skip_before_action :verify_authenticity_token
+
+  def destroy_session
+    request.session_options[:skip] = true
+  end
+
+end

app/controllers/api/v2/users_controller.rb

@@ -0,0 +1,9 @@
+class Api::V2::UsersController < ApplicationController
+  def show
+    @user = User.find(params[:id])
+
+    # 原文使用 Api::V1::UserSerializer
+    # 我们现在使用 app/views/api/v1/users/show.json.jbuilder
+    # render(json: Api::V1::UserSerializer.new(user).to_json)
+  end
+end

app/helpers/api/v2/base_helper.rb

@@ -0,0 +1,2 @@
+module Api::V2::BaseHelper
+end

app/helpers/api/v2/users_helper.rb

@@ -0,0 +1,2 @@
+module Api::V2::UsersHelper
+end

app/views/api/v2/users/show.json.jbuilder

@@ -0,0 +1,3 @@
+json.user do
+  json.(@user, :id, :email, :name,  :activated, :admin, :created_at, :updated_at)
+end

config/routes.rb

@@ -29,7 +29,7 @@ RedmineApp::Application.routes.draw do
   mount Mobile::API => '/api'
 
   namespace :api do
-    namespace :v1 do
+    namespace :v2 do
       resources :users, only: [:index, :create, :show, :update, :destroy]
       # 原文有 microposts, 我们现在把它注释掉
       # resources :microposts, only: [:index, :create, :show, :update, :destroy]

db/migrate/20160307071054_add_authentication_token_to_users.rb

@@ -0,0 +1,4 @@
+class AddAuthenticationTokenToUsers < ActiveRecord::Migration
+  def change
+  end
+end

spec/controllers/api/v2/base_controller_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe Api::V2::BaseController, :type => :controller do
+
+end

spec/controllers/api/v2/users_controller_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe Api::V2::UsersController, :type => :controller do
+
+end