weekly_polapix.rb

def weekly_polapix( start_date, end_date, classes )
      results = []
      results << "Week from #{ start_date } to #{ end_date }"
      classes.each do | range |
            n = Order.where( :state => :printed.to_s, :created_at => start_date .. end_date ).select{ | w | range.include?( w.order_items.map( &:quantity ).sum ) }.count
            results << "#{ range }: #{ n }"
      end
      results
end
def auto_weekly_polapix( start_date = Date.today.beginning_of_week - 1.week, end_date = Date.today.beginning_of_week )
      classes = [
            1 .. 3,
            4 .. 8,
            9 .. 11,
            12 .. 16,
            17 .. 23,
            24 .. 30,
            31 .. 36,
            36 .. 10000
      ]
      results = weekly_polapix( start_date, end_date, classes )
      puts results
end
# Usage:
# auto_weekly_polapix
# Nachholung:
# ( 1 .. 4 ).each do | i |
#     auto_weekly_polapix Date.today.beginning_of_week - i.weeks, Date.today.beginning_of_week - ( i - 1 ).weeks
# end