DatabaseCleaner 在 :transaction 上失败

Question

我有一个 Rails API，我正在尝试用 Rspec 进行测试。我在 Gemfile 和运行 sudo bundle install 中为 mongoid 添加了 DatabaseCleaner，但出现以下错误。

我是否缺少其中任何一个配置？

The DatabaseCleaner::Mongoid adapter has been extracted to its own gem: database_cleaner-mongoid, and will be removed from database_cleaner in 2.0. To silence this message, please replace `gem "database_cleaner"` with `gem "database_cleaner-mongoid"` in your Gemfile.
F

Failures:

  1) Users POST /api/v1/users creates a new user with valid details
     Failure/Error: DatabaseCleaner.strategy = :transaction

     DatabaseCleaner::UnknownStrategySpecified:
       The 'transaction' strategy does not exist for the mongoid ORM!  Available strategies: truncation
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:150:in `rescue in require_orm_strategy'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:146:in `require_orm_strategy'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:142:in `rescue in orm_strategy'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:133:in `orm_strategy'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:112:in `create_strategy'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:34:in `strategy='
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/configuration.rb:19:in `block in strategy='
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/configuration.rb:19:in `each'
     # /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/configuration.rb:19:in `strategy='
     # ./spec/rails_helper.rb:42:in `block (2 levels) in <top (required)>'
     # ------------------
     # --- Caused by: ---
     # NameError:
     #   uninitialized constant DatabaseCleaner::Mongoid::Transaction
     #   Did you mean?  DatabaseCleaner::Mongoid::Truncation
     #   /var/lib/gems/2.5.0/gems/database_cleaner-1.8.4/lib/database_cleaner/base.rb:135:in `const_get'

Finished in 0.18763 seconds (files took 2.8 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/requests/users_request_spec.rb:18 # Users POST /api/v1/users creates a new user with valid details

Gemfile

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'rspec-rails'
  gem 'factory_bot_rails'
  gem 'database_cleaner-mongoid'
end

rails_helper.rb

RSpec.configure do |config|
  config.use_transactional_fixtures = false

  config.before(:suite) do
    DatabaseCleaner.clean_with(:truncation)
  end

  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  config.before(:each, :js => true) do
    DatabaseCleaner.strategy = :truncation
  end

  config.before(:each) do
    DatabaseCleaner.start
  end

  config.after(:each) do
    DatabaseCleaner.clean
  end

  config.before(:all) do
    DatabaseCleaner.start
  end

  config.after(:all) do
    DatabaseCleaner.clean
  end
end

Answer 1

该错误消息非常简单明了。你不能在 mongoid 上使用事务策略。该配置用于 ActiveRecord。

在切换策略之间的整个想法是事务比截断快得多。但是当运行测试异步时，您不能依赖事务来正确清除数据库。

当然，这不是 Mongoid 上的一个选项，数据库清理器甚至不再与 ActiveRecord 相关。

RSpec.configure do |config|
  config.use_transactional_fixtures = false

  DatabaseCleaner.strategy = :truncation
  config.around(:each) do |example|
    DatabaseCleaner.cleaning do
       example.run
    end
  end

  config.before(:all) do
    DatabaseCleaner.start
  end

  config.after(:all) do
    DatabaseCleaner.clean
  end
end

DatabaseCleaner 在 :transaction 上失败

DatabaseCleaner fails on :transaction

rspec

ruby-on-rails

mongoid