has_measurement_value_for.rb

enumerated_marker 'this-cname' do
        label_mapping yes: 'Current',
                    no: 'Never',
                    quit_over_a_year_ago: 'Quit > 1 year ago',
                    quit_over_15_years_ago: 'Quit > 15 years ago',
                    quit_less_than_a_year_ago: 'Quit < 1 year ago'
  daily_frequency do
    condition {|patient| patient.has_measurement_and_value_for?('this-cname', :yes) || 
    patient.has_measurement_and_value_for?('this-cname', :no) }
    value 365 * 10
  end
  
  daily_frequency do
    condition {|patient| patient.has_measurement_and_value_for?('this-cname', :quit_over_a_year_ago) }
    value 365 * 5
  end
  
  daily_frequency do
    value 365
  end
end