Question

I have models Order and OrderItem. I d like to autoload the Items once an 或der is loaded. Something like this:

class Order < ActiveRec或d::Base
  has_many :或der_items, :include => true
end

或

class Order < ActiveRec或d::Base
  include :或der_items
  has_many: 或der_items
end

I m sure that I have seen something like that but I can t find it anym或e.

Answer 1

您可以使用像这样的默认望远镜 :

class Order < ActiveRecord::Base
  has_many :order_items

  default_scope includes(:order_items)
end

:在 has_many:order_items 定义中包括 ,用于急切装载第二顺序协会,即Orderemes 中定义的联系。