app/models/user.rb

user.rb

def stripe_coupon
  customer = Stripe::Customer.retrieve(self.stripe_id)
  
  if customer['discount'] == nil
    false
  else
    coupons = customer['discount']['coupon']
  end
  
  rescue
    false
end

def coupon_discount
  if self.coupon_percent_off
    self.coupon_percent_off
  elsif self.coupon_amount_discount
    self.coupon_amount_discount
  end
end

def coupon_percent_off
  if  self.stripe_coupon['percent_off'] != nil
    self.stripe_coupon['percent_off'].to_s + "%" + " Off"
  end
end

def coupon_amount_discount
  if  self.stripe_coupon['amount_off'] != nil
    "$" + (self.stripe_coupon['amount_off'].to_i / 100).to_s + " Off"
  end
end