Does Rails 4 have support for OR queries

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

is how you’d do that in Active Record.

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

So you could also do:

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