Redmine

    QueryColumn.new(:total_estimated_hours,

      :sortable => "COALESCE((SELECT SUM(estimated_hours) FROM #{Issue.table_name} subtasks" +

        " WHERE subtasks.root_id = #{Issue.table_name}.root_id AND subtasks.lft >= #{Issue.table_name}.lft AND subtasks.rgt <= #{Issue.table_name}.rgt), 0)",

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

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

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

    map_total(scope.sum(:estimated_hours)) {|t| t.to_f.round(2)}

  end

  # Returns sum of all the issue's time entries hours

  def total_for_spent_hours(scope)

    total = if group_by_column.try(:name) == :project