Rails includes with conditions

Question

According to this guide Active Record Querying

You can specify conditions on includes for eager loading like this

Person.includes(:notes).where("notes.important", true)

It recommends to use joins anyway.

A workaround for this would be to create another association like this

class Person < ActiveRecord::Base
  has_many :important_notes, :class_name => 'Note', 
           :conditions => ['important = ?', true]
end

You would then be able to do this

Person.find(:all, include: :important_notes)