Rails 4:如何重置测试数据库? [英] Rails 4: How to reset test database?

问题描述

我在 Rails 4 上，注意到我的一些 RSpec 测试失败了，因为我的一些测试重构使用了一个 before 过滤器(大概是因为事务).这篇文章描述了一个类似的问题:

I'm on Rails 4 and have noticed some of my RSpec tests are failing because some of my test refactorings use a before filter (presumably because of transactions). This post describes a similar issue:

rails 测试数据库在一些运行后未清除

代替使用 DatabaseCleaner gem，是否有清除测试数据库的 rake 命令?我相信 rake db:test:prepare 在 Rails 4 中已被弃用.此外，如果在像

In lieu of using the DatabaseCleaner gem, is there a rake command to clear out the test database? I believe rake db:test:prepare is deprecated in Rails 4. Also, if before transactions like

`post :create, user: Fabricate.attributes_for(:user)`

是否具有持久性，是否有替代的重构方式来避免手动清除测试数据库的需要?

are persistent, is there an alternative way of refactoring to avoid the need to manually clear out the test database?

推荐答案

一个矫枉过正的解决方案是:

An overkill solution would be:

bundle exec rake db:drop RAILS_ENV=test
bundle exec rake db:create RAILS_ENV=test
bundle exec rake db:schema:load RAILS_ENV=test

你可以在一个 rake 任务中完成这一切并运行它.

You could make this all in a rake task and run that.

来自 此处 是包含以下您的 spec_helper.rb 文件

Another solution from here is to include the following your spec_helper.rb file

config.after :all do
  ActiveRecord::Base.subclasses.each(&:delete_all)
end

免责声明:我尚未对此进行测试，您应该阅读 SO post 因为它可能不适用于所有情况.

Disclaimer: I have not tested this and you should read the SO post as it may not work in all situations.

话虽如此，我还是建议使用数据库清理器 gem 来避免这种情况.

That being said, I would recommend using the database cleaner gem to avoid situations such as this.

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