无法访问 RSpec 中的非持久关联

Question

问题： 我有两个型号 Contract 和 Appendix。后者的范围 persisted 用于排除非持久对象。我想为范围编写规范，但似乎我根本无法访问规范内的非持久关联。

型号：

class Contract < ApplicationRecord
  has_many :appendixes
end

class Appendix < ApplicationRecord
  belongs_to :contract
  scope :persisted, -> { where 'id IS NOT NULL' }
end

附录模型规格：

context 'within persisted scope' do
  it 'returns only persisted appendixes' do
    contract = Contract.create(attributes_for(:contract))
    Appendix.create(attributes_for(:appendix, contract: contract))
    contract.appendixes.new
    byebug
  end
end

示例：

当达到 byebug 断点时，contract.appendixes returns 与 contract.appendixes.persisted 相同，尽管在 byebug 之前，新的非持久性附录被初始化，这应该有所不同（？）：

(byebug) contract.appendixes
#<ActiveRecord::Associations::CollectionProxy []>
(byebug) contract.appendixes.persisted
#<ActiveRecord::AssociationRelation []>

同时，在 rails 控制台中重复相同的规范时，它按预期工作：

2.5.1 :061 > c = Contract.last
2.5.1 :062 > c.appendixes
 => #<ActiveRecord::Associations::CollectionProxy []>
2.5.1 :063 > c.appendixes.new
 => #<Appendix id: nil, ...
2.5.1 :064 > c.appendixes
 => #<ActiveRecord::Associations::CollectionProxy [#<Appendix id: nil, ...
2.5.1 :065 > c.appendixes.persisted
  Appendix Load (1.6ms)  SELECT  "appendixes".* FROM "appendixes" WHERE "appendixes"."contract_id" =  AND (id IS NOT NULL) LIMIT   [["contract_id", "b3a1645b-d4b1-4f80-9c43-6ddf3f3b7aba"], ["LIMIT", 11]]
 => #<ActiveRecord::AssociationRelation []>

我用FactoryBot attributes for initializing objects directly to DB just in case (I previously initialized the object through FactoryBot completely but then I thought that FactoryBot might not interact with DB the usual way, this is also said in FactoryBot's documentation).

问题：如何从我的规范中的合约对象中读取非持久性附录？

我用：

Ruby 2.5.1p57
Rails 5.1.6
RSpec 3.8.0
工厂机器人 4.11.0
工厂机器人Rails 4.11.0

Answer 1

恐怕我在测试时可能 .reload 不小心调用了规范中的 contract 对象。因此，我猜想@Sergio 和@ayushi 指出的 cache 部分实际上在其中发挥了作用，感谢您的提及！

我也在 FactoryBot 的帮助下编写了规范，因此无需将其排除在这种情况之外：

context 'withing persisted scope' do
  it 'returns only persisted appendixes' do
    contract = create(:contract)
    appendix = contract.appendixes.new
    expect(contract.appendixes).to include(appendix)
    expect(contract.appendixes.persisted).not_to include(appendix)
  end
end

无法访问 RSpec 中的非持久关联

Can't access non-persisted associations in RSpec

rspec

ruby-on-rails

ruby-on-rails-5.1

factory-bot