应该有匹配器失败与活动记录::协会类型不匹配时测试唯一性

Question

我正在开发一个 Rails5 API，我得到了一个 ActiveRecord：：AssociationTypeMismatch： 测试模型关联时出错。代码如下：

用户.rb：

class User < ApplicationRecord
  acts_as_paranoid
  has_secure_password
  has_many :contracts
end

service.rb：

class Service < ApplicationRecord
  acts_as_paranoid
  has_many :contracts
end

合同.rb：

class Contract < ApplicationRecord
  acts_as_paranoid
  belongs_to :user
  belongs_to :service
  validates_presence_of :user
  validates :service, presence: true, uniqueness: { scope: :user_id }
end

contract_spec.rb：

RSpec.describe Contract, type: :model do
  let(:contract) { create(:contract) }
  describe 'Validations' do
    it { is_expected.to validate_presence_of(:user) }
    it { is_expected.to validate_presence_of(:service) }
    it { is_expected.to validate_uniqueness_of(:service).scoped_to(:user_id) }
  end
  describe 'Associations' do
    it { is_expected.to belong_to(:user) }
    it { is_expected.to belong_to(:service) }
  end
end

我的测试失败，并显示：

1) Contract Validations should validate that :service is case-sensitively unique within the scope of :user_id
     Failure/Error: it { is_expected.to validate_uniqueness_of(:service).scoped_to(:user_id) }
     ActiveRecord::AssociationTypeMismatch:
       Service(#47073011870820) expected, got String(#47072966778980)

我似乎还有其他一些看起来像这样的问题，但没有一个对这个问题有可行的解决方案。任何帮助将不胜感激。

Answer 1

我遇到了同样的问题。一种解决方法是定义subject

describe 'Validations' do
  subject { create(:contract) }
  it { is_expected.to validate_presence_of(:user) }
  it { is_expected.to validate_presence_of(:service) }
  it { is_expected.to validate_uniqueness_of(:service).scoped_to(:user_id) }
end

源：当记录是新记录且属性是关联时，validates_uniqueness_of不起作用