#351

backend/app/controllers/posts_controller.rb

@@ -392,7 +392,7 @@ class PostsController < ApplicationController
       tag = tags_by_id[tag_id]
       return nil unless tag
 
-      sections = PostTagSection.where(post_id: post.id, tag_id: tag.id)
+      sections = PostTagSection.where(post_id: post.id, tag_id:)
                  .as_json(only: [:begin_ms, :end_ms])
 
       if path.include?(tag_id)
@@ -419,7 +419,7 @@ class PostsController < ApplicationController
 
     params[:parent_post_ids].to_s.split.map { |token|
       id = Integer(token, exception: false)
-      raise ArgumentError, "親投稿 Id. が不正です: #{ token }" if id.nil? || id <= 0
+      raise ArgumentError, "親投稿 Id. が不正です: #{ token }" if !(id) || id <= 0
 
       id
     }.uniq