factory_girl 不能很好地使用 rspec2 - ActiveRecord::AssociationTypeMismatch

Question

我正在使用 Rails 3.1.0rc8、Factory Girl 2.1.2、Factory Girl Rails 1.2.0 和 RSpec 2.7.0。

我认为我遇到的错误与this thread 上讨论的问题有关。

我有一个看起来像这样的规范：

spec/integration/my_integration_spec.rb：

require 'spec_helper'

describe 'A Workflow' do
  before(:all) do
    @reseller = Factory(:reseller)
    @product = Factory(:product, :reseller => @reseller)
  end

  describe 'A feature' do
    it 'Does something' do
    end

    describe 'A sub-feature' do
      before(:all) do
        # Error!
        @product.sold_at << Factory(:outlet, :reseller => @reseller)
      end

      it 'Does something' do
      end
    end
  end

运行此规范会导致子功能出现异常：

Failure/Error: @product.sold_at << Factory(:outlet, :reseller => @reseller)
ActiveRecord::AssociationTypeMismatch:
  Reseller(#90828680) expected, got Reseller(#59351220)

有趣的是，当我将嵌套前挂钩的内容移动到主前挂钩时，不会发生此错误。

require 'spec_helper'

describe 'A Workflow' do
  before(:all) do
    @reseller = Factory(:reseller)
    @product = Factory(:product, :reseller => @reseller)

    # No error!
    @product.sold_at << Factory(:outlet, :reseller => @reseller)
  end

  describe 'A feature' do
    it 'Does something' do
    end

    describe 'A sub-feature' do
      it 'Does something' do
      end
    end
  end

非常感谢您对理解此问题的任何帮助。

Answer 1

每个规范文件中只能有一个before(:all)。使用before(:all) at the top of a spec and thenbefore(:each)in a describe block. This is the reason that your second example works, you have removed the secondbefore(:all)`。

另外，请注意before(:all)。此处创建的任何数据都不会在规范结束时从数据库中删除，您需要在 after(:all) 中删除它或使用数据库清理器 gem。推理见link。