filter_range_fields = [
        (('min_date', 'max_date'), models.ScheduleC.incurred_date),
        (('min_amount', 'max_amount'), models.ScheduleC.original_loan_amount),
        (('min_image_number', 'max_image_number'), models.ScheduleC.image_number),
        (('min_payment_to_date', 'max_payment_to_date'), models.ScheduleC.payment_to_date),