create_record

# File activerecord/lib/active_record/associations/collection_association.rb, line 423
        def create_record(attributes, options, raise = false, &block)
          unless owner.persisted?
            raise ActiveRecord::RecordNotSaved, "You cannot call create unless the parent is saved"
          end

          if attributes.is_a?(Array)
            attributes.collect { |attr| create_record(attr, options, raise, &block) }
          else
            transaction do
              add_to_target(build_record(attributes, options)) do |record|
                yield(record) if block_given?
                insert_record(record, true, raise)
              end
            end
          end
        end