#309

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