CODEWITHSUNDEEP
ruby-on-rails
alexxero
alexxero

Reputation: 103

How to implement discount for products in rails

I'm trying to implement a discount for each individual product in a catalogue. I added new field to Products table - discount. How do I recalculate product.price if discount.present?

I tried to add helper to product.rb:

def price
 old_price = self.price
 if self.discount.present?
  self.price -= self.price / self.discount
 else
  old_price
end

But it gets me to "Stack level too deep" error

Upvotes: 0

Views: 959

Answers (1)

Eyeslandic
Eyeslandic

Reputation: 14900

You get this error because price is constantly referencing itself. You would be much better off by creating a new method to display the price.

def price_with_discount
  return self.price if self.discount.nil? || self.discount.zero?
  self.price - (self.price / self.discount)
end

And then you use that in your view

<%= product.price_with_discount %>

Upvotes: 4

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