Form/FormInstance versioning

schemas.py

class VisitSchema():
  ...
  
  forms = fields.Method('forms_data')

  @staticmethod
  def forms_data(visit):
      forms = []
      for form in visit.forms_versioned:
          # Full implementation would need another level for the form_fields
          form_data = FormSummarySchema().dump(form).data
          form_data['formSections'] = FormSectionSummarySchema().dump(
              visit.form_sections_versioned(form.id), many=True).data
          forms.append(form_data)
      return forms
    

class FormSchema():
  # Would be very similar, except that the visit object would need to be passed down and retrieved via context

visit.py

class Visit():
  ...
  
  @hybrid_property
    def forms_versioned(self):
        from .forms import PilotForm
        FormVersion = version_class(PilotForm)

        return _versioned_query(FormVersion.query.filter_by(visit_def_id=self.visit_def_id),
                                FormVersion,
                                self._protocol_amendment).all()

    def form_sections_versioned(self, form_id):
        from .forms import PilotFormSection
        FormSectionVersion = version_class(PilotFormSection)

        return _versioned_query(FormSectionVersion.query.filter_by(form_id=form_id),
                                FormSectionVersion,
                                self._protocol_amendment).all()