変更時刻の取り消し

[yanokwa (Yaw Anokwa)]

あるモデレーターがトピックの「アンバンプ」のためにタイムスタンプを変更したため、その変更を元に戻したくなりました。そこで、この処理を行う rake タスクを作成しました。小さなことですが、共有してみようと思います。

# /var/www/discourse/lib/tasks/set_timestamp_to_last_version.rake
desc "トピック内のすべての投稿のタイムスタンプを、その投稿の last_version_at に設定する"
task "set_timestamp_to_last_version", [:topic_id] => :environment do |_, args|
  topic_id = args[:topic_id]
  if !topic_id
    puts "ERROR: rake set_timestamp_to_last_version[topic_id] の形式で実行してください"
    exit 1
  end

  Post.where(topic_id: topic_id).each do |p|
    p.created_at = p.last_version_at
    p.updated_at = p.last_version_at
    if !p.save
      puts "投稿 #{p.id} の保存エラー"
    end
  end

  p_first = Post.where(topic_id: topic_id).first
  p_last = Post.where(topic_id: topic_id).last

  t = Topic.where(id: topic_id).first
  t.created_at = p_first.last_version_at
  t.updated_at = p_last.last_version_at
  t.bumped_at = p_last.last_version_at
  t.last_posted_at = p_last.last_version_at
  if !t.save
    puts "トピック #{t.id} の保存エラー"
  end
end

[jomaxro (Joshua Rosenfeld)]

@zogstrip thoughts on pr-welcome? It’d be great for this to be on Github instead of needing to copy/paste from here if @yanokwa is willing to write one.

[zogstrip]

Does that happen often? I think it’s the first time I’ve seen someone undoing it. Also, why not change the timestamp back via the UI? What’s missing?

[yanokwa (Yaw Anokwa)]

I only have a vague recollection of what went wrong, but I’ll try…

In Dec 2017, we accidentally moved our introductions topic (started in Jun 2017 and has daily posts) to Dec 2017. And it did what was expected in that it moved the first post to Dec 2017 and added the other posts sequentially. But it looked funny, in that all the posts had been squished into Dec 2017. I tried to move things back to Jun 2017, but then the squishing put al the posts into Jun 2017 instead of spreading them from Jun to Dec.

Again, this is what I think happened. Either way, I didn’t have time to figure it all out, so I wanted to restore the posts to their original date and when I poked around in the DB, this is what I came up with.

As far as things that would be good to add to the UI, I’d say:

• If this squishing is reproducible, allow an undo of a timestamp change in the way I’ve done above.
• A cleaner way to bump and unbump topics