gistfile1.rb

module Sequel
    module Plugins
        module OracleSequence
            module InstanceMethods
                def before_create
                    seq_name = model.dataset.opts[:sequence]
                    unless self.class.simple_pk.nil? or seq_name.nil?
                        method = "#{self.primary_key.to_s}=".to_sym
                        self.send(method, DB.fetch("SELECT #{seq_name}.NEXTVAL FROM DUAL").first[:nextval])
                    end
                    super
                end
            end
        end
    end
end