module Ddr::Batch class BatchObjectDatastream < ActiveRecord::Base belongs_to :batch_object, :inverse_of => :batch_object_datastreams OPERATION_ADD = "ADD" # add this datastream to the object -- considered an error if datastream already exists OPERATION_ADDUPDATE = "ADDUPDATE" # add this datastream to or update this datastream in the object OPERATION_UPDATE = "UPDATE" # update this datastream in the object -- considered an error if datastream does not already exist OPERATION_DELETE = "DELETE" # delete this datastream from the object -- considered an error if datastream does not exist PAYLOAD_TYPE_BYTES = "BYTES" PAYLOAD_TYPE_FILENAME = "FILENAME" PAYLOAD_TYPES = [ PAYLOAD_TYPE_BYTES, PAYLOAD_TYPE_FILENAME ] end end