notOneOf method

JarMixed notOneOf(
  1. List<T> forbiddenValues, [
  2. String? message
])

Implementation

JarMixed notOneOf(List<T> forbiddenValues, [String? message]) {
  return addValidator((value) {
    if (value == null && !forbiddenValues.contains(null)) return null;
    return forbiddenValues.contains(value)
        ? (message ?? 'Must not be one of the forbidden values')
        : null;
  });
}