22 lines
732 B
Ruby
22 lines
732 B
Ruby
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#---
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# Excerpted from "Agile Web Development with Rails",
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# published by The Pragmatic Bookshelf.
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# Copyrights apply to this code. It may not be used to create training material,
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# courses, books, articles, and the like. Contact us if you are in doubt.
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# We make no guarantees that this code is fit for any purpose.
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# Visit http://www.pragmaticprogrammer.com/titles/rails4 for more book information.
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#---
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class Cart < ActiveRecord::Base
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has_many :line_items, dependent: :destroy
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def add_product(product_id)
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current_item = line_items.find_by_product_id(product_id)
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if current_item
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current_item.quantity += 1
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else
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current_item = line_items.build(product_id: product_id)
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end
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current_item
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end
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end
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