Add AMS 0.10.0.rc1 by default for api apps

railties/lib/rails/generators/rails/app/templates/Gemfile

@@ -21,6 +21,11 @@ source 'https://rubygems.org'
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
+<%- if options.api? -%>
+# Use ActiveModelSerializers to serialize JSON responses
+gem 'active_model_serializers', '~> 0.10.0.rc1'
+
+<%- end -%>
 <% if  RUBY_ENGINE == 'ruby' -%>
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console

railties/test/generators/api_app_generator_test.rb

@@ -38,6 +38,7 @@ def test_api_modified_files
       assert_no_match(/gem 'jquery-rails'/, content)
       assert_no_match(/gem 'sass-rails'/, content)
       assert_no_match(/gem 'jbuilder'/, content)
+      assert_match(/gem 'active_model_serializers'/, content)
     end
 
     assert_file "config/application.rb" do |content|