updates and spec fixes

spec/controllers/api/posts_controller/index_spec.rb

@@ -98,7 +98,7 @@ RSpec.describe Api::PostsController, type: :controller do
               type: "comment",
               attributes: {body: "post-1-comment-1"},
               relationships: {
-                post: {data: {id: post1.id.to_s, type: "posts"}}
+                post: {data: {id: post1.id.to_s, type: "post"}}
               }
             }
           ],

spec/controllers/api/posts_controller/update_spec.rb

@@ -31,7 +31,7 @@ RSpec.describe Api::PostsController, type: :controller do
               type: "comment",
               attributes: {body: "post-1-comment-1"},
               relationships: {
-                post: {data: {id: post1.id.to_s, type: "posts"}}
+                post: {data: {id: post1.id.to_s, type: "post"}}
               }
             }
           ]

spec/dummy/app/serializers/api/comment_serializer.rb

@@ -1,4 +1,4 @@
 class Api::CommentSerializer < ActiveModel::Serializer
   attribute :body
-  belongs_to :post
+  belongs_to :post, serializer: Api::PostSerializer
 end

spec/dummy/app/serializers/api/post_serializer.rb

@@ -1,5 +1,5 @@
 class Api::PostSerializer < ActiveModel::Serializer
   attribute :title
   attribute :body
-  has_many :comments
+  has_many :comments, serializer: Api::CommentSerializer
 end

spec/dummy/config/initializers/new_framework_defaults.rb

@@ -17,8 +17,8 @@ ActiveSupport.to_time_preserves_timezone = true
 # Require `belongs_to` associations by default. Previous versions had false.
 Rails.application.config.active_record.belongs_to_required_by_default = true
 
-# Do not halt callback chains when a callback returns false. Previous versions had true.
-ActiveSupport.halt_callback_chains_on_return_false = false
+## Do not halt callback chains when a callback returns false. Previous versions had true.
+#ActiveSupport.halt_callback_chains_on_return_false = false
 
 # Configure SSL options to enable HSTS with subdomains. Previous versions had false.
 Rails.application.config.ssl_options = { hsts: { subdomains: true } }