David Underwood
882c18b5e6
Checkout now stores its items using a quantity and a link back to the original product instance. It has a reference to the store to make sure that product IDs added are valid
21 lines
353 B
Ruby
21 lines
353 B
Ruby
class Shop
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class DuplicateProductIdError < StandardError; end
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def initialize
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@products = []
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end
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def products
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@products
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end
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def add_product(product)
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raise DuplicateProductIdError if product_by_id(product.id)
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@products.push(product)
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end
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def product_by_id(id)
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@products.find { |product| product.id == id }
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end
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end
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