fix review controller and serializer

app/controllers/v1/reviews_controller.rb

 class V1::ReviewsController < ApplicationController
-  before_action :set_review, only: [:destroy, :rate]
+  before_action :set_review, only: [:show, :destroy, :rate]
   before_action :authenticate_user!, only: [:create, :rate, :destroy]
 
-  # GET /v1/learning_objects/1/reviews
-  # GET /v1/learning_objects/1/reviews.json
+  # GET /v1/reviews
   def index
-    render json: Review.where(reviewable: reviewable)
+    render json: Review.all
+  end
+
+  # GET /v1/reviews/1
+  def show
+    render json: @review
   end
 
   # POST /v1/learning_objects/1/reviews
@@ -51,5 +55,4 @@ class V1::ReviewsController < ApplicationController
   def set_review
     @review ||= Review.find(params[:id])
   end
-
 end

app/serializers/review_serializer.rb

 class ReviewSerializer < ActiveModel::Serializer
-  attributes :id, :name, :created_at, :updated_at, :description, :privacy, :score
-end
\ No newline at end of file
+  attributes :id, :name, :description, :pros, :cons, :rates_count, :created_at, :updated_at, :reviewable, :user
+end