diff --git a/Gemfile b/Gemfile
index 5288edd52..34a1a7956 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,7 @@ unless RUBY_PLATFORM =~ /w32/
 end
 
 gem 'grape', '~> 0.9.0'
+gem 'grape-entity'
 gem 'seems_rateable', path: 'lib/seems_rateable'
 gem "rails", "3.2.13"
 gem "jquery-rails", "~> 2.0.2"
@@ -49,9 +50,9 @@ group :development, :test do
 	gem 'guard-spork', '~> 1.5.1'
 	gem 'guard-test', '~> 1.0.0'
 	gem 'ruby-prof', '~> 0.15.1' unless RUBY_PLATFORM =~ /w32/
-	gem 'pry'
-	gem 'pry-nav'
-
+	gem 'pry-rails'
+  gem 'pry-byebug'
+  gem 'pry-remote'
 end
 
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 43252793e..a7239fc80 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,6 +57,9 @@ GEM
       ice_nine (~> 0.11.0)
       thread_safe (~> 0.3, >= 0.3.1)
     builder (3.0.0)
+    byebug (2.7.0)
+      columnize (~> 0.3)
+      debugger-linecache (~> 1.2)
     capybara (2.4.1)
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
@@ -81,6 +84,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.7.1)
+    columnize (0.9.0)
+    debugger-linecache (1.2.0)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     equalizer (0.0.9)
@@ -102,6 +107,9 @@ GEM
       rack-accept
       rack-mount
       virtus (>= 1.0.0)
+    grape-entity (0.4.4)
+      activesupport
+      multi_json (>= 1.3.2)
     guard (2.6.1)
       formatador (>= 0.2.4)
       listen (~> 2.7)
@@ -169,8 +177,14 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.4)
       win32console (~> 1.3)
-    pry-nav (0.2.3)
-      pry (~> 0.9.10)
+    pry-byebug (1.3.2)
+      byebug (~> 2.7)
+      pry (~> 0.9.12)
+    pry-rails (0.3.2)
+      pry (>= 0.9.10)
+    pry-remote (0.1.8)
+      pry (~> 0.9)
+      slop (~> 3.0)
     rack (1.4.5)
     rack-accept (0.4.5)
       rack (>= 0.4)
@@ -286,6 +300,7 @@ DEPENDENCIES
   factory_girl (~> 4.4.0)
   fastercsv (~> 1.5.0)
   grape (~> 0.9.0)
+  grape-entity
   guard-rails (~> 0.5.3)
   guard-spork (~> 1.5.1)
   guard-test (~> 1.0.0)
@@ -298,8 +313,9 @@ DEPENDENCIES
   net-ldap (~> 0.3.1)
   nokogiri (~> 1.6.3)
   paperclip (~> 3.5.4)
-  pry
-  pry-nav
+  pry-byebug
+  pry-rails
+  pry-remote
   rack-mini-profiler!
   rack-openid
   rails (= 3.2.13)
diff --git a/app/api/mobile/api.rb b/app/api/mobile/api.rb
index 918c5d73c..4add19248 100644
--- a/app/api/mobile/api.rb
+++ b/app/api/mobile/api.rb
@@ -1,11 +1,5 @@
 module Mobile
 
-  $LOAD_PATH << File.expand_path('..',__FILE__)
-
-  autoload :Auth,  'apis/auth'
-  autoload :Users, 'apis/users'
-  autoload :Courses, 'apis/courses'
-
   class API < Grape::API
     version 'v1', using: :path
     format :json
@@ -30,9 +24,9 @@ module Mobile
       end
     end
 
-    mount Auth
-    mount Users
-    mount Courses
+    mount Apis::Auth
+    mount Apis::Users
+    mount Apis::Courses
 
   end
 end
diff --git a/app/api/mobile/apis/auth.rb b/app/api/mobile/apis/auth.rb
index acd5fe1e2..33eff26ad 100644
--- a/app/api/mobile/apis/auth.rb
+++ b/app/api/mobile/apis/auth.rb
@@ -1,20 +1,31 @@
 module Mobile
-  class Auth < Grape::API
-    resource :auth do
-      desc "Creates and returns access_token if valid login"
-      params do
-        requires :login, type: String, desc: 'Username or email'
-        requires :password, type: String, desc: 'Password'
-      end
-      post :login do 
-        user,last_logon = ::User.try_to_login(params[:login], params[:password])
-        if user
-          ::ApiKey.delete_all(user_id: user.id)
-          key = ::ApiKey.create!(user_id: user.id)
-          data = {token: key.access_token}.merge(user.as_json).merge(user.extensions.as_json)
-          {status: 0, data: data}
-        else
-          {status: 1, message: 'Unauthorized.'}
+
+  module Entities 
+    class Auth < Grape::Entity
+      expose :token
+      expose :user, using: User
+    end
+  end
+
+  module Apis
+    class Auth < Grape::API
+      resource :auth do
+        desc "Creates and returns access_token if valid login"
+        params do
+          requires :login, type: String, desc: 'Username or email'
+          requires :password, type: String, desc: 'Password'
+        end
+        post :login do 
+          user,last_logon = ::User.try_to_login(params[:login], params[:password])
+          if user
+            ::ApiKey.delete_all(user_id: user.id)
+            key = ::ApiKey.create!(user_id: user.id)
+            api_user = UserService.new.show_user(user.id)
+            present :data, {token: key, user: api_user}, using: Mobile:Entities::Auth
+            present :status, 0
+          else
+            {status: 1, message: 'Unauthorized.'}
+          end
         end
       end
     end
diff --git a/app/api/mobile/apis/courses.rb b/app/api/mobile/apis/courses.rb
index bd146e235..1084e8cbc 100644
--- a/app/api/mobile/apis/courses.rb
+++ b/app/api/mobile/apis/courses.rb
@@ -1,40 +1,32 @@
 module Mobile
-  class Courses < Grape::API
-    resource :courses do
-      desc "get all courses"
-      params do
-        requires :per_page_count, type: Integer
-        requires :page, type: Integer, desc: 'current page no'
-      end
-      get do
-        per_page_option = params[:per_page_count] || 10
-        page_no = params[:page] || 1
-        @courses_all = Course.active.visible.
-          joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id")
-        @course_count = @courses_all.count
-        @course_pages = Redmine::Pagination::Paginator.new @course_count, per_page_option,page_no 
-        @course_activity_count=Hash.new
-        @courses_all.each do |course|
-          @course_activity_count[course.id]=0
+  module Apis
+    class Courses < Grape::API
+      resource :courses do
+        desc "get all courses"
+        params do
+          optional :school_id, type: Integer, desc: 'school number'
+          requires :per_page_count, type: Integer
+          requires :page, type: Integer, desc: 'current page no'
         end
-        @courses = @courses_all.order("created_at desc")
-        @s_type = 0
-        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)
-        {status: 0, data: @courses}
-        # @course_activity_count=get_course_activity @courses, @course_activity_count
-      end
-
-      desc "Return a course"
-      params do
-        requires :id, type: Integer
-      end
-      route_param :id do
         get do
-          course = Course.find(params[:id])
-          {status: 0, data: course}
+          cs = CoursesService.new
+          courses = cs.course_list(params)
+          present :data, courses, with: Mobile::Entities::Course
+          present :status, 0
         end
-      end
 
+        desc "Return a course"
+        params do
+          requires :id, type: Integer
+        end
+        route_param :id do
+          get do
+            course = Course.find(params[:id])
+            {status: 0, data: course}
+          end
+        end
+
+      end
     end
   end
 end
diff --git a/app/api/mobile/apis/users.rb b/app/api/mobile/apis/users.rb
index c9ecdd84f..df17782f2 100644
--- a/app/api/mobile/apis/users.rb
+++ b/app/api/mobile/apis/users.rb
@@ -1,27 +1,31 @@
 module Mobile
-  class Users < Grape::API
-    resource :users do
-      desc "get all users"
-      get do
-        ['hello']
-      end
-
-      desc "add a user"
-      params do
-        requires :login, type: String, desc: 'username'
-        requires :mail, type: String, desc: 'mail'
-        requires :password, type: String, desc: 'password'
-      end
-      post do
-        us = UsersService.new
-        begin
-          user = us.register params.merge(:password_confirmation => params[:password],
-                                          :should_confirmation_password => true)
-          raise "register failed." if user.new_record?
-          {status: 0, data: user}
-        rescue => e
-          {status: 1, message: e.message}
+  module Apis
+    class Users < Grape::API
+      resource :users do
+        desc "get all users"
+        get do
+          ['hello']
         end
+
+        desc "add a user"
+        params do
+          requires :login, type: String, desc: 'username'
+          requires :mail, type: String, desc: 'mail'
+          requires :password, type: String, desc: 'password'
+        end
+        post do
+          us = UsersService.new
+          begin
+            user = us.register params.merge(:password_confirmation => params[:password],
+                                            :should_confirmation_password => true)
+            raise "register failed #{user.errors.full_messages}" if user.new_record?
+            present :data, user, with: Mobile::Entities::User
+            present :status, 0
+          rescue => e
+            {status: 1, message: e.message}
+          end
+        end
+
       end
     end
   end
diff --git a/app/api/mobile/entities/course.rb b/app/api/mobile/entities/course.rb
new file mode 100644
index 000000000..b9823d9ac
--- /dev/null
+++ b/app/api/mobile/entities/course.rb
@@ -0,0 +1,38 @@
+module Mobile
+  module Entities
+    class Course < Grape::Entity
+      def self.course_expose(field)
+        expose field do |f,opt|
+          f[:course][field] || f[:course].__send__(field)
+        end
+      end
+      expose :img_url
+      course_expose :attachmenttype
+      course_expose :class_period
+      course_expose :code
+      course_expose :created_at
+      course_expose :description
+      course_expose :endup_time
+      course_expose :extra
+      course_expose :id
+      course_expose :inherit_members
+      course_expose :is_public
+      course_expose :lft
+      course_expose :location
+      course_expose :name
+      course_expose :open_student
+      # course_expose :password
+      course_expose :rgt
+      course_expose :school_id
+      course_expose :setup_time
+      course_expose :state
+      course_expose :status
+      course_expose :string
+      course_expose :tea_id
+      course_expose :term
+      course_expose :time
+      course_expose :updated_at
+      course_expose :teacher
+    end
+  end
+end
diff --git a/app/api/mobile/entities/user.rb b/app/api/mobile/entities/user.rb
new file mode 100644
index 000000000..33ae3f049
--- /dev/null
+++ b/app/api/mobile/entities/user.rb
@@ -0,0 +1,20 @@
+module Mobile
+    module Entities
+    class User < Grape::Entity
+      #头像
+      #昵称
+      expose :login
+      #性别
+      expose :gender do |user, opt|
+        user.user_extentions.gender
+      end
+      #我的二维码
+      #工作单位
+      #邮箱地址
+      expose :mail
+      #地区
+      #签名
+    end
+  end
+
+end
diff --git a/config/initializers/autoreload_grape.rb b/config/initializers/autoreload_grape.rb
new file mode 100644
index 000000000..ceffb9425
--- /dev/null
+++ b/config/initializers/autoreload_grape.rb
@@ -0,0 +1,26 @@
+if Rails.env.development?
+  lib_ruby_files = Dir.glob(File.join("app/api/**", "*.rb"))
+  lib_reloader ||= ActiveSupport::FileUpdateChecker.new(lib_ruby_files) do
+    # lib_ruby_files.each do |lib_file|
+    #   puts "start require #{lib_file}"
+    #   require_dependency(lib_file) 
+    # end
+    #
+
+    # binding.pry
+    # if Object.const_defined?(:Mobile)
+    #   Object.send(:remove_const, :Mobile)
+    # end
+    #
+    # $".delete_if {|s| s.include?('api/mobile') }
+    # require File.join(Rails.root,"app/api/mobile/api.rb")
+    Rails.application.reload_routes!
+  end
+
+  ActionDispatch::Callbacks.to_prepare do
+    lib_reloader.execute_if_updated
+  end
+
+end
+
+