37 lines
835 B
Ruby
37 lines
835 B
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 not null
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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, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
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after_create :remove_from_stock
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before_destroy :put_back_in_stock
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accepts_nested_attributes_for :product
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def product_attributes=(attributes)
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self.product = Product.find(attributes[:id])
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super
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end
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private
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def remove_from_stock
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product.increment!(:stock, - self.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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