Rails 4 是否支持 OR 查询

问题描述：

因此在 Rails 4 中添加了使用not 查询的长期期望的功能.

So in Rails 4 the long desired feature to use not queries has been added.

Article.where.not(title: 'Rails 3')

是否为 或 查询添加了类似的支持，或者他们是否计划实现.我通过浏览发行说明找不到任何内容.

Has similar support been added for or queries, or are they planning to make it. I couldn't find anything by browsing through the release notes.

显然我试过了

Article.where(title: 'Rails 3').or(title: 'Rails 4')

但这行不通.

答

Article.where(title: ['Rails 3', 'Rails 4'])

就是你在 Active Record 中的做法.

is how you'd do that in Active Record.

不可能使用Rails-y"语法复制任何任意 SQL 查询.但是你总是可以只传入文字 sql.

It's not possible to replicate any arbitrary SQL query using "Rails-y" syntax. But you can always just pass in literal sql.

所以你也可以这样做:

Article.where("articles.title = 'Rails 3' OR articles.title = 'Rails 4'")