Ruby on rails Shoulda无法正确验证区分大小写的唯一

使用

shoulda

和

FactoryGirl

测试模型验证

工厂

FactoryGirl.define do
  factory :tag do
    value { Faker::Lorem.word }

    user
  end
end

标签型号

class Tag < ApplicationRecord
  validates :value,
            presence: true,
            uniqueness: { case_sensitive: false }

  belongs_to :user
  has_and_belongs_to_many :cards
end

我在运行测试时遇到以下错误

Failures:

  1) Tag validations should validate that :value is case-sensitively unique
     Failure/Error: it { should validate_uniqueness_of(:value) }

       Tag did not properly validate that :value is case-sensitively unique.
         After taking the given Tag, setting its :value to ‹"an arbitrary
         value"›, and saving it as the existing record, then making a new Tag
         and setting its :value to a different value, ‹"AN ARBITRARY VALUE"›,
         the matcher expected the new Tag to be valid, but it was invalid
         instead, producing these validation errors:

         * value: ["has already been taken"]
         * user: ["must exist"]
     # ./spec/models/tag_spec.rb:6:in `block (3 levels) in <top (required)>'
     # -e:1:in `<main>'

故障：
1） 标记验证应验证：值区分大小写唯一
失败/错误：它{应该验证（：值）的唯一性}
标记未正确验证：值是否区分大小写唯一。
获取给定标记后，将其：值设置为è“任意”
值“›”，并将其保存为现有记录，然后制作新标记
并将其：值设置为不同的值，è“任意值”›，
匹配器希望新标记有效，但它无效
相反，产生以下验证错误：
*值：[“已获取”]
*用户：[“必须存在”]
#./spec/models/tag_spec.rb:6:in'block（3层）in'
#-e:1:in`'

测试

不区分大小写的正确方法是使用下面的matcher

it { should validate_uniqueness_of(:value).case_insensitive }

您也可以使用
忽略案例敏感性
编写：

it { should validate_uniqueness_of(:value).ignoring_case_sensitivity }

it { should validate_uniqueness_of(:value).ignoring_case_sensitivity }