Add serializer to customer

Gemfile

@@ -25,6 +25,8 @@ gem 'puma', '~> 3.7'
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
 # gem 'rack-cors'
 
+gem 'active_model_serializers'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

Gemfile.lock

@@ -24,6 +24,11 @@ GEM
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    active_model_serializers (0.10.6)
+      actionpack (>= 4.1, < 6)
+      activemodel (>= 4.1, < 6)
+      case_transform (>= 0.2)
+      jsonapi-renderer (>= 0.1.1.beta1, < 0.2)
     activejob (5.1.4)
       activesupport (= 5.1.4)
       globalid (>= 0.3.6)
@@ -48,6 +53,8 @@ GEM
       debug_inspector (>= 0.0.1)
     builder (3.2.3)
     byebug (9.1.0)
+    case_transform (0.2)
+      activesupport
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
     crass (1.0.2)
@@ -61,6 +68,7 @@ GEM
     jquery-turbolinks (2.1.0)
       railties (>= 3.1.0)
       turbolinks
+    jsonapi-renderer (0.1.3)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -151,6 +159,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  active_model_serializers
   better_errors
   binding_of_caller
   byebug

app/controllers/customers_controller.rb

@@ -5,7 +5,8 @@ def index
     customers = Customer.all
 
     render(
-      json: customers.as_json(except: [:created_at, :updated_at]),
+      # json: customers.as_json(except: [:created_at, :updated_at]),
+      json: customers,
       status: :ok
     )
   end
@@ -14,7 +15,7 @@ def show
     customer = Customer.find_by(id: params[:id])
     if customer
       render(
-        json: customer.as_json(except: [:created_at, :updated_at]),
+        json: customer,
         status: :ok
       )
     else

app/serializers/customer_serializer.rb

@@ -0,0 +1,4 @@
+class CustomerSerializer < ActiveModel::Serializer
+  attributes :id, :name, :registered_at, :address, :city, :state, :postal_code, :phone, :account_credit, :movies_checked_out_count
+
+end