def METHOD_NAME(self):
    d = super().METHOD_NAME()
    if d.get('condition_min_value') and d.get('benefit_only_apply_to_cheapest_n_matches'):
        # field is hidden by JS
        d['benefit_only_apply_to_cheapest_n_matches'] = None
    if d.get('subevent_mode') == Discount.SUBEVENT_MODE_DISTINCT and d.get('condition_min_value'):
        # field is hidden by JS
        d['condition_min_value'] = Decimal('0.00')
    if d.get('condition_min_count') is None:
        d['condition_min_count'] = 0
    if d.get('condition_min_value') is None:
        d['condition_min_value'] = Decimal('0.00')
    return d