validate method

  1. @override
String? validate(
  1. F form,
  2. E key,
  3. String value
)
override

Implementation

@override
String? validate(F form, E key, String value) {
  if (value.length < min || value.length > max) {
    return loc.lengthRangeError(min, max);
  }
  return null;
}