redmine/app/views/versions/show.api.rsb

api.version do
  api.id @version.id
  api.project(:id => @version.project_id, :name => @version.project.name) unless @version.project.nil?

  api.name            @version.name
  api.description     @version.description
  api.status          @version.status
  api.due_date        @version.effective_date
  api.sharing         @version.sharing
  api.wiki_page_title @version.wiki_page_title
  if User.current.allowed_to?(:view_time_entries, @project)
    api.estimated_hours(@version.visible_fixed_issues.estimated_hours)
    api.spent_hours(@version.spent_hours)
  end

  render_api_custom_values @version.visible_custom_field_values, api

  api.created_on @version.created_on
  api.updated_on @version.updated_on
end