Representations 追加（#241） (#267)

#241

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #267

backend/app/controllers/posts_controller.rb

@@ -36,8 +36,7 @@ class PostsController < ApplicationController
     end
 
     render json: { posts: posts.map { |post|
-      post.as_json(include: { tags: { only: [:id, :category, :post_count],
-                                      methods: [:name, :has_wiki] } }).tap do |json|
+      PostRepr.base(post).tap do |json|
         json['thumbnail'] =
             if post.thumbnail.attached?
               rails_storage_proxy_url(post.thumbnail, only_path: false)
@@ -60,10 +59,7 @@ class PostsController < ApplicationController
 
     viewed = current_user&.viewed?(post) || false
 
-    render json: (post
-                  .as_json(include: { tags: { only: [:id, :category, :post_count],
-                                              methods: [:name, :has_wiki] } })
-                  .merge(viewed:))
+    render json: PostRepr.base(post).merge(viewed:)
   end
 
   def show
@@ -102,9 +98,7 @@ class PostsController < ApplicationController
       sync_post_tags!(post, tags)
 
       post.reload
-      render json: post.as_json(include: { tags: { only: [:id, :category, :post_count],
-                                                   methods: [:name, :has_wiki] } }),
-             status: :created
+      render json: PostRepr.base(post), status: :created
     else
       render json: { errors: post.errors.full_messages }, status: :unprocessable_entity
     end
@@ -170,7 +164,7 @@ class PostsController < ApplicationController
 
     events = []
     pts.each do |pt|
-      tag = pt.tag.as_json(only: [:id, :category], methods: [:name, :has_wiki])
+      tag = TagRepr.base(pt.tag)
       post = pt.post
 
       events << Event.new(
@@ -269,8 +263,7 @@ class PostsController < ApplicationController
       return nil unless tag
 
       if path.include?(tag_id)
-        return tag.as_json(only: [:id, :category, :post_count],
-                           methods: [:name, :has_wiki]).merge(children: [])
+        return TagRepr.base(tag).merge(children: [])
       end
 
       if memo.key?(tag_id)
@@ -282,8 +275,7 @@ class PostsController < ApplicationController
 
       children = child_ids.filter_map { |cid| build_node.(cid, new_path) }
 
-      memo[tag_id] = tag.as_json(only: [:id, :category, :post_count],
-                                 methods: [:name, :has_wiki]).merge(children:)
+      memo[tag_id] = TagRepr.base(tag).merge(children:)
     end
 
     root_ids.filter_map { |id| build_node.call(id, []) }