oneNumber static method

ValidationRule oneNumber({
  1. String message = 'Must contain at least one number',
})

Validation rule to require at least one numeric digit.

Returns message if no digit is found.

Implementation

static ValidationRule oneNumber({
  String message = 'Must contain at least one number',
}) {
  return ValidationRule(
    (value) => RegExp(r'[0-9]').hasMatch(value ?? '') ? null : '',
    message,
  );
}