Rails 工厂与同一个对象有多个关联答案

【问题标题】：Rails factories having multiple associations to same objectRails 工厂与同一个对象有多个关联
【发布时间】：2019-01-01 06:29:49
【问题描述】：

我有一个具有如下关联的模型：-

 class Order < ApplicationRecord
  belongs_to :customer, inverse_of: :orders
  belongs_to :user, inverse_of: :orders
  belongs_to :shipping_address, class_name: "Customer::Address", inverse_of: :shipped_orders
  belongs_to :billing_address, class_name: "Customer::Address", inverse_of: :billed_orders
end

另外，customer_address 有一个字段 customer_id。我的工厂是这样的：-

FactoryGirl.define do
  factory :order do 
    customer
    user
    association :shipping_address, factory: :customer_address, customer_id: customer.id 
    association :billing_address, factory: :customer_address, customer_id: customer.id
  end
end

但我无法访问 customer.id。我收到此错误：-

undefined method `id' for #<FactoryGirl::Declaration::Implicit:0x007fa3e6979d70>

如何将 customer.id 传递给 shipping_address 和 billing_address 关联？

【问题讨论】：

标签： ruby-on-rails ruby testing ruby-on-rails-5 factory

【解决方案1】：

您可以使用after(:build) 回调来构建您的customer_address 记录。

FactoryGirl.define do
    factory :order do 
        association :customer
        association :user
        after(:build) do |order|
            order.shipping_address = FactoryGirl.build(:customer_address, customer_id: order.customer_id)
            order.billing_address = FactoryGirl.build(:customer_address, customer_id: order.customer_id)
        end
    end
end

【讨论】：