#4 Add user serializer

app/controllers/api/v1/application_controller.rb

@@ -3,7 +3,7 @@ class Api::V1::ApplicationController < ActionController::Base
 
   skip_before_action :verify_authenticity_token
 
-  serialization_scope :current_user!
+  serialization_scope :view_context
   before_action :current_user!
   before_action :authenticate_user_from_token
 

app/controllers/api/v1/users_controller.rb

@@ -1,8 +1,21 @@
 class Api::V1::UsersController < Api::V1::ApplicationController
 
+  before_action :load_user, except: [:me]
 
   def show
+    render json: @user, serializer: UserSerializer
+
+  end
+
+  def me
     render json: @current_user
   end
+  
+  private 
+  
+  def load_user
+    @user = User.find_by id: params[:id]
+    render json: {msg: '不能找到该用户'}, status: 404 unless @user
+  end
 
 end

app/controllers/application_controller.rb

@@ -1,7 +1,7 @@
 class ApplicationController < ActionController::Base
   include ActionController::Serialization
 
-  serialization_scope :current_user!
+  serialization_scope :view_context
   before_action :current_user!
 
   def current_user!

app/models/user.rb

@@ -21,6 +21,10 @@ class User < ActiveRecord::Base
     User.where(id: user_ids)
   end
 
+  def followers_ids
+     FollowRelation.where(star_id: self.id).pluck(:user_id)
+  end
+
   def active_auth_token
     if auth_tokens.empty?
       generate_auth_key

app/serializers/user_serializer.rb

@@ -1,4 +1,13 @@
 class UserSerializer < ActiveModel::Serializer
 
+  attributes :id, :name, :email, :followed
+
+  def followed
+    return true if object == scope.current_user
+    object.followers_ids.include? scope.current_user
+  end
+
+
+
 
 end

config/routes.rb

@@ -78,6 +78,8 @@ Rails.application.routes.draw do
       get '/top/:type', to: 'dashboard#top'
       get '/top', to: 'dashboard#top_all'
 
+      get '/users/me', to: 'users#me'
+
       resources :users, only:[:show] do
         resources :follow, only: [:create]
         post :unfollow, to: 'follow#destroy'