gurix/helena

fieldset.checkbox_group class="#{'helena-error' if errors[question.code]}"
  legend= question_label(question, dummy: true)

  = form.simple_fields_for :answers do |answer_form|
    - question.sub_questions.each do |sub_question|
      .checkbox
        label
          - checked = (answers[sub_question.code].to_s == sub_question.value.to_s) if sub_question.value
          - checked ||= sub_question.preselected
          = answer_form.input_field sub_question.code, as:      :boolean,
                                                       value:   sub_question.value,
                                                       checked: checked
          = sub_question.text
  - if errors[question.code]
    .error= errors[question.code]