def self.last_bonus_date(customer,bonus_type,since_date)
bonuses = BonusPurchase.find_all_by_customer_id(customer, :conditions => ["date >= ?", since_date], :order => 'date DESC')
def self.last_bonus_date(customer,bonus_type,since_date)
bonuses = BonusPurchase.find_all_by_customer_id(customer, :conditions => ["date >= ?", since_date], :order => 'date DESC')