Redmine

    QueryColumn.new(:parent_id, :sortable => "#{Project.table_name}.lft ASC", :default_order => 'desc', :caption => :field_parent),

    QueryColumn.new(:is_public, :sortable => "#{Project.table_name}.is_public", :groupable => true),

    QueryColumn.new(:created_on, :sortable => "#{Project.table_name}.created_on", :default_order => 'desc'),

    QueryColumn.new(:last_activity_date)

  ]

      :values => [[l(:general_text_yes), "1"], [l(:general_text_no), "0"]]

    )

    add_available_filter "created_on", :type => :date_past

    add_custom_fields_filters(project_custom_fields)

  end