mastodon/db/migrate/20190306145741_add_lock_version_to_polls.rb

class AddLockVersionToPolls < ActiveRecord::Migration[5.2]
  def change
    add_column :polls, :lock_version, :integer, null: false, default: 0
  end
end
Add optimistic lock to avoid race conditions when handling votes (#10196) * Add optimistic lock to avoid race conditions when handling votes * Force-reload polls when getting `ActiveRecord::StaleObjectError` 2019-03-06 18:53:57 +00:00			`class AddLockVersionToPolls < ActiveRecord::Migration[5.2]`
			`def change`
			`add_column :polls, :lock_version, :integer, null: false, default: 0`
			`end`
			`end`