openproject/lib/report/group_by/singleton_value.rb

#-- copyright
# ReportingEngine
#
# Copyright (C) 2010 - 2014 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#++

class Report::GroupBy
  class SingletonValue < Base
    dont_display!

    put_sql_table_names 'singleton_value' => false
    select_fields '1 as singleton_value'

    def define_group(sql)
      sql.select '1 as singleton_value'
      sql.group_by 'singleton_value'
    end
  end
end