当我运行`bundle exec rake test：prepare`时它出错了，但是`bundle exec rake db：test：prepare`会很好地发出警告。 这是怎么回事？
[英]When I ran `bundle exec rake test:prepare` it errored out, but `bundle exec rake db:test:prepare` goes through fine with warning. What's going on?
问题描述
So according to this link one is a shortcut wrapper (so I'm guessing they're the same). 
所以根据这个链接，一个是快捷包装器（所以我猜它们是相同的）。
When I ran bundle exec rake db:test:prepare , I get this error: 当我运行bundle exec rake db:test:prepare ，我收到此错误：
Don't know how to build task 'test:prepare'
/Users/aj/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/bin/ruby_executable_hooks:15:in `eval'
/Users/aj/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/bin/ruby_executable_hooks:15:in `<main>'
...but when I ran bundle exec rake db:test:prepare , I get this warning: ...但是当我运行bundle exec rake db:test:prepare ，我收到此警告：
WARNING: db:test:prepare is deprecated. The Rails test helper now maintains your test schema automatically, see the release notes for details.
Can anyone shed light on this? 任何人都可以阐明这一点吗？
1 个解决方案
解决方案1
50 2014-04-28 21:55:06
In Rails 4.1+, they deprecated db:test:prepare with that message. 在Rails 4.1+中，他们弃用db：test：使用该消息进行准备。 You can now just use: 你现在可以使用：
ActiveRecord::Migration.maintain_test_schema!
in spec_helper.rb (or similar files if you're not using RSpec). 在spec_helper.rb（或类似的文件，如果你没有使用RSpec）。 That will automatically keep your test database in sync with your schema. 这将自动使您的测试数据库与您的架构保持同步。 Because of this 'automatic' method, db:test:prepare is no longer needed in most cases. 由于这种“自动”方法，在大多数情况下不再需要db：test：prepare。
If you need to do it manually for some reason, you can still use 如果由于某种原因需要手动完成，您仍然可以使用
rake db:schema:load RAILS_ENV=test
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