class ActiveRecord::InverseOfAssociationNotFoundError

def initialize(reflection = nil, associated_class = nil)
  if reflection
    @reflection = reflection
    @associated_class = associated_class.nil? ? reflection.klass : associated_class
    super("Could not find the inverse association for #{reflection.name} (#{reflection.options[:inverse_of].inspect} in #{associated_class.nil? ? reflection.class_name : associated_class.name})")
  else
    super("Could not find the inverse association.")
  end
end