#264

backend/app/controllers/posts_controller.rb

@@ -127,17 +127,20 @@ class PostsController < ApplicationController
     post = Post.new(title:, url:, thumbnail_base: nil, uploaded_user: current_user,
                     original_created_from:, original_created_before:)
     post.thumbnail.attach(thumbnail)
-    if post.save
-      post.resized_thumbnail!
+
+    ActiveRecord::Base.transaction do
+      post.save!
       tags = Tag.normalise_tags(tag_names)
       tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
-
-      post.reload
-      render json: PostRepr.base(post), status: :created
-    else
-      render json: { errors: post.errors.full_messages }, status: :unprocessable_entity
+      post.resized_thumbnail!
+      PostVersionRecorder.record!(post:, event_type: :create, created_by_user: current_user)
     end
+
+    post.reload
+    render json: PostRepr.base(post), status: :created
+  rescue ActiveRecord::RecordInvalid
+    render json: { errors: post.errors.full_messages }, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
   end
@@ -166,19 +169,22 @@ class PostsController < ApplicationController
     original_created_before = params[:original_created_before]
 
     post = Post.find(params[:id].to_i)
-    if post.update(title:, original_created_from:, original_created_before:)
+
+    ActiveRecord::Base.transaction do
+      post.update!(title:, original_created_from:, original_created_before:)
       tags = post.tags.where(category: 'nico').to_a +
              Tag.normalise_tags(tag_names, with_tagme: false)
       tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
-
-      post.reload
-      json = post.as_json
-      json['tags'] = build_tag_tree_for(post.tags)
-      render json:, status: :ok
-    else
-      render json: post.errors, status: :unprocessable_entity
+      PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
     end
+
+    post.reload
+    json = post.as_json
+    json['tags'] = build_tag_tree_for(post.tags)
+    render json:, status: :ok
+  rescue ActiveRecord::RecordInvalid
+    render json: post.errors, status: :unprocessable_entity
   rescue Tag::NicoTagNormalisationError
     head :bad_request
   end