Want to find records with no associated records in RailsConsider a simple association... class Person has_many :friends end class Friend belongs_to :person end What is the cleanest way to get all persons that have NO friends in ARel and/or meta_where? And then what about a has_many :through version class Person has_many :contacts has_many :friends, :through => :contacts, :uniq => true end class Friend has_many :contacts has_many :people, :through => :c
