FactoryGirl-调用def\u委托人时出现命名错误

def_delegators .

例如,本测试:

it 'has the weekly discount' do
  //I also tried using create here
  menu = FactoryGirl.build(:menu, weekly_price: 100, price: 200)
  meal = FactoryGirl.build(:meal, menu: menu)
  price = meal.price
end

1) Order has the weekly discount
   Failure/Error: price = meal.price

   NoMethodError:
     undefined method `price' for nil:NilClass
   # ./spec/models/order_spec.rb:17:in `block (2 levels) in <top (required)>'

这就是价格的定义 Meal

class Meal < ApplicationRecord
  extend Forwardable
  belongs_to :menu

  def_delegators :@menu, :price
end

如果我将其更改为:

class Meal < ApplicationRecord
  extend Forwardable
  belongs_to :menu

  def price
    menu.price
  end
end

测试通过。我在其他地方使用def_委托人,在所有测试中都失败了 NoMethodError