Redmine

#!/usr/bin/env /home/redmine/redmine/script/runner

field = UserCustomField.find_by_name('Employee')

employee_ids = field.custom_values.find_all_by_value('1').map { |o| o.customized_id }

Project.all.each do |project|

    employee_ids.each do |employee_id|

        project.members << Member.new(:user_id => employee_id,

                                      :project => project,

                                      :role => Role.find_by_name('Rapporteur'),

                                      :mail_notification => false)

    end

end