onValidate method

  1. @override
ValidationResult onValidate(
  1. FieldController<num> controller
)
override

Implementation

@override
ValidationResult onValidate(FieldController<num> controller) =>
    ValidationResult(
      key: GenericValidators.negativeNum.name,
      message: message,
      isValid: (controller.value ?? -1) < 0,
    );