暫

# create_table :campaigns do |t|
#   t.datetime :start_at
#   t.datetime :end_at
# end
class Campaign < ActiveRecord::Base
  shibaraku
end

Campaign.in_time
# => SELECT start_at <= now < end_at records

Campaign.in_time(super_user)
# => SELECT test_start_at <= now < test_end_at records

campaign = Campaign.create(start_at: 1.hour.ago, end_at: 1.hour.since)
campaign.in_time? # => true