new

# File activerecord/lib/active_record/associations.rb, line 168
    def initialize(owner_class_name = nil, reflection = nil, through_reflection = nil)
      if owner_class_name && reflection && through_reflection
        super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' which goes through '#{owner_class_name}##{through_reflection.name}' before the through association is defined.")
      else
        super("Cannot have a has_many :through association before the through association is defined.")
      end
    end