rails/rails — pull request #6500 by jeroeningen (2012-05-26 17:22:43+00:00)
Title: ActiveRecord::Calculations#pluck accepts multiple columns

Rails currently supports this:
Person.pluck(:id) # SELECT people.id FROM people

I added two possibilities:
Person.pluck(:id) # SELECT people.id FROM people
Person.pluck([:id, :name]) # SELECT people.id, people.name FROM people
Person.pluck(:id, :name) # SELECT people.id, people.name FROM people