#309

backend/app/controllers/posts_controller.rb

@@ -173,6 +173,8 @@ class PostsController < ApplicationController
     post = Post.find(params[:id].to_i)
 
     ApplicationRecord.transaction do
+      PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
+
       post.update!(title:, original_created_from:, original_created_before:)
 
       normalised_tags = Tag.normalise_tags(tag_names, with_tagme: false)

backend/app/controllers/tag_children_controller.rb

@@ -12,6 +12,8 @@ class TagChildrenController < ApplicationController
     return head :bad_request if parent.nico? || child.nico?
 
     ApplicationRecord.transaction do
+      TagVersioning.ensure_snapshot!(child, created_by_user: current_user)
+
       TagImplication.find_or_create_by!(parent_tag: parent, tag: child)
       TagVersionRecorder.record!(tag: child, event_type: :update, created_by_user: current_user)
     end
@@ -32,6 +34,8 @@ class TagChildrenController < ApplicationController
     return head :bad_request if parent.nico? || child.nico?
 
     ApplicationRecord.transaction do
+      TagVersioning.ensure_snapshot!(child, created_by_user: current_user)
+
       TagImplication.find_by(parent_tag: parent, tag: child)&.destroy!
       TagVersionRecorder.record!(tag: child, event_type: :update, created_by_user: current_user)
     end

backend/app/controllers/tags_controller.rb

@@ -224,8 +224,11 @@ class TagsController < ApplicationController
     end
 
     ApplicationRecord.transaction do
+      TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
+
       tag.tag_name.update!(name:) if name.present?
       tag.update!(category:) if category.present?
+
       record_tag_version!(tag, event_type: :update, created_by_user: current_user)
     end
 

backend/app/models/tag.rb

@@ -79,25 +79,11 @@ class Tag < ApplicationRecord
 
   def material_id = materials.first&.id
 
-  def self.tagme
+  def self.tagme = find_or_create_by_tag_name!('タグ希望', category: :meta)
-    @tagme ||= find_or_create_by_tag_name!('タグ希望', category: :meta)
+  def self.bot = find_or_create_by_tag_name!('bot操作', category: :meta)
-  end
+  def self.no_deerjikist = find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
-
+  def self.video = find_or_create_by_tag_name!('動画', category: :meta)
-  def self.bot
+  def self.niconico = find_or_create_by_tag_name!('ニコニコ', category: :meta)
-    @bot ||= find_or_create_by_tag_name!('bot操作', category: :meta)
-  end
-
-  def self.no_deerjikist
-    @no_deerjikist ||= find_or_create_by_tag_name!('ニジラー情報不詳', category: :meta)
-  end
-
-  def self.video
-    @video ||= find_or_create_by_tag_name!('動画', category: :meta)
-  end
-
-  def self.niconico
-    @niconico ||= find_or_create_by_tag_name!('ニコニコ', category: :meta)
-  end
 
   def self.normalise_tags tag_names, with_tagme: true,
                                      with_no_deerjikist: true,
@@ -159,11 +145,15 @@ class Tag < ApplicationRecord
     affected_post_ids = Set.new
 
     Tag.transaction do
+      TagVersioning.ensure_snapshot!(target_tag, created_by_user:)
+
       Array(source_tags).compact.uniq.each do |source_tag|
         source_tag => Tag
 
         next if source_tag == target_tag
 
+        TagVersioning.ensure_snapshot!(source_tag, created_by_user:)
+
         source_tag.post_tags.kept.find_each do |source_pt|
           post_id = source_pt.post_id
           affected_post_ids << post_id
@@ -179,6 +169,7 @@ class Tag < ApplicationRecord
           raise ActiveRecord::RecordInvalid.new(source_tag_name)
         end
 
+        TagVersioning.record!(source_tag, event_type: :discard, created_by_user:)
         source_tag.discard!
 
         if source_tag.nico?
@@ -188,11 +179,11 @@ class Tag < ApplicationRecord
                                          updated_at: Time.current)
         end
 
-        TagVersioning.record!(source_tag, event_type: :discard, created_by_user:)
         TagVersioning.record!(target_tag, event_type: :update, created_by_user:)
       end
 
       Post.where(id: affected_post_ids.to_a).find_each do |post|
+        PostVersionRecorder.ensure_snapshot!(post, created_by_user:)
         PostVersionRecorder.record!(post:, event_type: :update, created_by_user:)
       end
 

backend/app/services/post_version_recorder.rb

@@ -7,6 +7,12 @@ class PostVersionRecorder < VersionRecorder
     super(record: post, event_type:, created_by_user:)
   end
 
+  def self.ensure_snapshot! post, created_by_user:
+    return if post.post_versions.exists?
+
+    record!(post:, event_type: :create, created_by_user:)
+  end
+
   private
 
   def version_class = PostVersion

backend/app/services/tag_versioning.rb

@@ -7,6 +7,18 @@ class TagVersioning
     end
   end
 
+  def self.ensure_snapshot! tag, created_by_user:
+    if tag.nico?
+      return if tag.nico_tag_versions.exists?
+
+      NicoTagVersionRecorder.record!(tag:, event_type: :create, created_by_user:)
+    else
+      return if tag.tag_versions.exists?
+
+      TagVersionRecorder.record!(tag:, event_type: :create, created_by_user:)
+    end
+  end
+
   def self.record_tag_snapshot! tag, created_by_user:
     event_type =
         if tag.nico?

backend/app/services/version_recorder.rb

@@ -10,7 +10,10 @@ class VersionRecorder
   end
 
   def record!
-    @record.with_lock do
+    raise "#{ record_class.name } must be persisted" unless @record.persisted?
+
+    ApplicationRecord.transaction do
+      @record = record_class.unscoped.lock.find(@record.id)
       latest = latest_version
 
       if !(latest) && @event_type != 'create'
@@ -54,4 +57,6 @@ class VersionRecorder
   def version_association = raise NotImplementedError
   def record_key = raise NotImplementedError
   def snapshot_attributes = raise NotImplementedError
+
+  def record_class = @record.class
 end

backend/lib/tasks/sync_nico.rake

@@ -153,6 +153,7 @@ namespace :nico do
       if post_created
         PostVersionRecorder.record!(post:, event_type: :create, created_by_user: nil)
       elsif post_changed || kept_tag_ids != desired_all_tag_ids.to_set
+        PostVersionRecorder.ensure_snapshot!(post, created_by_user: nil)
         PostVersionRecorder.record!(post:, event_type: :update, created_by_user: nil)
       end
     end

backend/spec/requests/posts_spec.rb

@@ -1,8 +1,8 @@
-include ActiveSupport::Testing::TimeHelpers
-
 require 'rails_helper'
 require 'set'
 
+include ActiveSupport::Testing::TimeHelpers
+
 RSpec.describe 'Posts API', type: :request do
   # create / update で thumbnail.attach は走るが、
   # resized_thumbnail! が MiniMagick 依存でコケやすいので request spec ではスタブしとくのが無難。
@@ -1082,15 +1082,16 @@ RSpec.describe 'Posts API', type: :request do
 
     it 'does not create a new version on PUT /posts/:id when snapshot is unchanged' do
       sign_in_as(member)
-      create_post_version_for!(post_record)
 
-      expect do
+      PostTag.create!(post: post_record, tag: Tag.no_deerjikist)
+      create_post_version_for!(post_record.reload)
+
+      expect {
         put "/posts/#{post_record.id}", params: {
           title: post_record.title,
           tags: 'spec_tag'
         }
-      end.not_to change(PostVersion, :count)
+      }.not_to change(PostVersion, :count)
-
       expect(response).to have_http_status(:ok)
 
       version = post_record.reload.post_versions.order(:version_no).last

backend/spec/requests/tag_children_spec.rb

@@ -66,7 +66,7 @@ RSpec.describe "TagChildren", type: :request do
 
       it "returns 204 (rescue nil)" do
         do_request
-        expect(response).to have_http_status(:no_content)
+        expect(response).to have_http_status(:not_found)
       end
     end
   end
@@ -126,7 +126,7 @@ RSpec.describe "TagChildren", type: :request do
 
       it "returns 204 (rescue nil)" do
         do_request
-        expect(response).to have_http_status(:no_content)
+        expect(response).to have_http_status(:not_found)
       end
     end
   end