class ActiveRecord::HasManyThroughAssociationNotFoundError

def initialize(owner_class = nil, reflection = nil)
  if owner_class && reflection
    @owner_class = owner_class
    @reflection = reflection
    super("Could not find the association #{reflection.options[:through].inspect} in model #{owner_class.name}")
  else
    super("Could not find the association.")
  end
end