must method

AbstractRuleBuilder must(
  1. bool validator(
    1. dynamic dyn
    ),
  2. String? message, {
  3. String? code,
})

Creates a new rule, passing in an expression and a message and returning a boolean

Implementation

AbstractRuleBuilder must(bool Function(dynamic dyn) validator, String? message, {String? code}) {
  rules.add(
    (dynamic param) => ValidationResult(
      hasError: !validator(param),
      errors: <ValidationError>[ValidationError(key: key, message: message ?? '', code: code ?? '')],
    ),
  );
  return this;
}