simulate_traffic.rb

class SimulateTraffic
  def initialize
    @dates = (first_date_of_last_month..Date.today).to_a
    @types = [:pageviews, :subscriptions, :shares, :clicks]
  end 

  def first_date_of_last_month
    prev_month = Date.today.prev_month

    Date.new(prev_month.year, prev_month.month, 1)
  end 

  def fake_daily
    hourly_count = 24.times.map{rand(1000)}
    DailyStat.create edition_id: Edition.first.id, date: @dates.sample, hourly_count: hourly_count, type: @types.sample, total: hourly_count.sum
  end 
end

simulator = SimulateTraffic.new

100.times do
  simulator.fake_daily
end