add counters to user auth sign in object

app/controllers/v1/sessions_controller.rb

+class V1::SessionsController < DeviseTokenAuth::SessionsController
+  def create
+    super do |resource|
+      return render json: resource
+    end
+  end
+end

app/models/collection.rb

@@ -40,7 +40,7 @@ class Collection < ApplicationRecord
   has_many :learning_objects, through: :collection_items, source: :collectionable, source_type: 'LearningObject'
   has_many :collection_items
 
-  belongs_to :owner, polymorphic: true
+  belongs_to :owner, polymorphic: true, counter_cache: true
 
   validates :name, :owner, presence: true
   validates_inclusion_of :privacy, in: %w(public private), message: 'Privacy must be public or private'

app/models/learning_object.rb

@@ -52,7 +52,7 @@ class LearningObject < ApplicationRecord
   has_many :collections, through: :collection_items
   has_many :attachments, class_name: 'LearningObject::Attachment', autosave: true # autosave to allow import
 
-  belongs_to :publisher, polymorphic: true
+  belongs_to :publisher, polymorphic: true, counter_cache: true
   belongs_to :language
   belongs_to :license
   belongs_to :object_type

app/models/like.rb

@@ -16,7 +16,7 @@ class Like < ApplicationRecord
   include Trackable
 
   belongs_to :likeable, polymorphic: true, counter_cache: true
-  belongs_to :user
+  belongs_to :user, counter_cache: true
 
   validates_presence_of :user, :likeable
   validates :user_id, uniqueness: { scope: [:likeable_id, :likeable_type] }

app/serializers/user_serializer.rb

 class UserSerializer < ActiveModel::Serializer
   cache key: 'user', expires_in: 4.hours
-  attributes :id, :email, :name, :description, :created_at, :updated_at, :role_ids, :institution_ids, :avatar
-  # has_many :roles
-  # has_many :institutions
+  attributes :id, :email, :name, :description, :role_ids, :institution_ids, :avatar, :likes_count, :learning_objects_count, :collections_count, :created_at, :updated_at
 end

config/routes.rb

@@ -67,7 +67,9 @@ Rails.application.routes.draw do
   end
 
   scope :v1 do
-    mount_devise_token_auth_for 'User', at: :auth
+    mount_devise_token_auth_for 'User', at: :auth, controllers: {
+      sessions: 'v1/sessions'
+    }
   end
 
   namespace :v1 do

db/migrate/20161125134057_add_counts_to_user.rb

+class AddCountsToUser < ActiveRecord::Migration[5.0]
+  def change
+    add_column :users, :likes_count, :integer, default: 0
+    add_column :users, :learning_objects_count, :integer, default: 0
+    add_column :users, :collections_count, :integer, default: 0
+  end
+end