How do I programatically override the formatter of a Ruport data table?

I have a pretty straight-forward Ruport setup in my Rails app, where the Ruport controller is passed a Report::Data::Table instance:

class Reporter < Ruport::Controller
  stage :headline, :data, :footer
  required_option :report

def setup
    report_klass = options.report.report_model
    report_klass ||= Report
    self.data = report_klass.send(:report_table_by_sql, options.report.query)
  end
end

The Data::Table instance that is stored in data uses Ruport::Data::Table as its delegated controller when asked to render, so that's what gets called when I later call

output << data.to_html

How can I tell data to delegate its rendering methods to the Reporter class, so all my hook overrides can live in one place?

Solution

Ruport's API documentation makes it clear that you can register a single Formatter descendant with multiple Controllers, so if you want to have a single formatter that implements all the hooks, you can simply say as much:

class DualPurposeFormatter < Ruport::Formatter::HTML
  renders :html, :for => [Reporter, Ruport::Controller::Table]

  #for Reporter controller
  def build_headline
    #...
  end

  #for Ruport::Controller::Table
  def build_row(row_data)
    #...
  end
end