new

# File activerecord/lib/active_record/associations.rb, line 127
    def initialize(owner = nil, reflection = nil)
      if owner && reflection
        super("Cannot dissociate new records through '#{owner.class.name}##{reflection.name}' on '#{reflection.source_reflection.class_name rescue nil}##{reflection.source_reflection.name rescue nil}'. Both records must have an id in order to delete the has_many :through record associating them.")
      else
        super("Cannot dissociate new records.")
      end
    end