ruby-on-rails - Rspec, shoulda, validate_uniqueness_of 与范围和错误的错误信息

Question

我有以下 Rspec 测试:

describe Productlimit do

  before(:each) do 
    @productlimit = Factory.create(:productlimit, :user => Factory.create(:user))
  end

  subject { @productlimit }

  ...

  it { should validate_uniqueness_of(:price_cents).scoped_to(:direction_down, :currency, :market_id, :user_id) }
  ...
end

但我收到以下令人困惑的错误:

1) Productlimit 
     Failure/Error: it { should validate_uniqueness_of(:price_cents).scoped_to(:direction_down, :currency, :market_id, :user_id) }
       Expected errors to include "has already been taken" when price_cents is set to 9530, got errors: ["direction_down has already been taken (false)"]

你能帮助我吗？我不明白为什么这不起作用，因为错误消息似乎是正确的？

编辑:

在其他情况下也会发生这种情况:

# product_spec.rb
...
it { should validate_numericality_of(:price).with_message("price_cents must be greater than 0 (0)") }  

# rake spec:models
Failure/Error: it { should validate_numericality_of(:price).with_message("price_cents must be greater than 0 (0)") }
   Expected errors to include "price_cents must be greater than 0 (0)" when price is set to "abcd", got errors: ["price_cents must be greater than 0 (0)"]

Answer 1

要检查 validate_uniqueness_of(:field) 但为此，您应该至少在数据库中有一条记录来检查唯一性约束。
这是....

before do
  @country = FactoryGirl.create(:country, :id =>"a0000007-0000-0000-0000-000000000009",:currency_id => "a0000006-0000-0000-0000-000000000004",:merchant_id => "a0000001-0000-0000-0000-000000000002",:country_code => 'CAN', :name => 'Canada')
end

验证唯一性

it { should validate_uniqueness_of(:country_code)}

它会解决的。