[英]Why is the “uniqueness: true” validation not working in my test (Rails)?
In my Rails app, I am trying to save MAC addresses for devices belonging to different users. 在我的Rails应用程序中,我试图为属于不同用户的设备保存MAC地址。 Each MAC address must be unique, so I included the uniqueness validation.
每个MAC地址必须是唯一的,因此我包括了唯一性验证。 The validation itself seems to be working, since duplicate records were rejected when I tried using the Rails Console (
ActiveRecord::RecordNotUnique
). 验证本身似乎正在起作用,因为当我尝试使用Rails控制台(
ActiveRecord::RecordNotUnique
)时,重复记录被拒绝了。 However, my test to check that only unique records can be saved is failing. 但是,我检查只能保存唯一记录的测试失败了。
So my questions are: 所以我的问题是:
before_save
callbacks? before_save
回调? This is the error message I'm getting for the test: 这是我要进行测试的错误消息:
Expected #<MacAddress id: nil, user_id: nil, address: "MACADD123", created_at: nil, updated_at: nil> to be nil or false
Setup in my model files: 在我的模型文件中进行设置:
# app/models/mac_address.rb
class MacAddress < ApplicationRecord
validates :address, uniqueness: true
belongs_to :user
end
# app/models/user.rb
class User < ApplicationRecord
has_many :mac_addresses, dependent: :destroy
end
Test to check for uniqueness: 测试以检查唯一性:
class MacAddressTest < ActiveSupport::TestCase
test 'mac address must be unique' do
new_mac = 'MACADD123'
assert MacAddress.create(user: User.first, address: new_mac)
assert MacAddress.all.pluck(:address).include?(new_mac)
# The 'assert_not' below is failing.
assert_not MacAddress.create(user: User.second, address: new_mac)
end
end
Thanks for any help in advance. 感谢您的任何帮助。
As per the documentation on create
: 根据有关
create
的文档 :
Notice there's no id
for that record. 请注意,该记录没有
id
。 It hasn't been persisted. 它尚未持久。 Check for errors with
.errors.full_messages
to see the uniqueness validation failure. 使用
.errors.full_messages
检查错误以查看唯一性验证失败。
The resulting object is returned whether the object was saved successfully to the database or not.
无论对象是否成功保存到数据库,都将返回结果对象。
You should assert that it's saved, like: 您应该断言它已保存,例如:
mac_address = MacAddress.create(...)
assert !mac_address.new_record?
Where that tells you if it's been saved or not. 告诉您是否已保存的位置。 Alternatively you can use
create!
或者,您可以使用
create!
which will raise ActiveRecord::RecordInvalid
if it failed. 如果失败,它将引发
ActiveRecord::RecordInvalid
。
For future reference and for anyone viewing this question - I rewrote my test with save
instead of create
like below: 供以后参考和任何查看此问题的人员-我用
save
重写了我的测试,而不是像下面这样create
:
test 'mac address must be unique' do
test_address = 'MACADD123'
original_mac = MacAddress.new(user: User.first, address: test_address)
duplicate_mac = MacAddress.new(user: User.second, address: test_address)
assert original_mac.save
assert MacAddress.pluck(:address).include?(test_address)
assert_not duplicate_mac.save
duplicate_mac.errors.messages[:address].include?('has already been taken')
end
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