[問題] 相同的instance和class method

[bypang (甚麼時候才等到妳)]

如果有相同結構的instance和class method，要如何做才能dry呢？

class Product < ActiveRecord::Base
  def price
    ...
  end

  def self.price
    ...
  end
end

class ProductsController < ApplicationController
  # use in ajax call
  def calculate
    price = Product.price
  end
end

謝謝各位大大

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