43 lines
1.1 KiB
Ruby
43 lines
1.1 KiB
Ruby
# == Schema Information
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#
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# Table name: order_items
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#
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# id :integer not null, primary key
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# order_id :integer
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# product_id :integer not null
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# count :integer default("0")
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#
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class OrderItem < ActiveRecord::Base
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belongs_to :order
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belongs_to :product
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validates :product, presence: true
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validates :count, presence: true, numericality: { only_integer: true,
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less_than_or_equal_to: ->(oi) { oi.product.try(:stock) || 100 },
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greater_than_or_equal_to: 0 }
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before_destroy :put_back_in_stock!
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after_create :remove_from_stock!
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accepts_nested_attributes_for :product
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def product_attributes=(attributes)
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self.product = OrderItem.products.select{ |p| p.id == attributes[:id].to_i }.first
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super
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end
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def self.products
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@products || Product.all
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end
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private
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def remove_from_stock!
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product.decrement!(:stock, count)
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end
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def put_back_in_stock!
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product.increment!(:stock, self.count)
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end
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end
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