minYear static method

String? minYear(
  1. DateTime? value,
  2. int minYear, {
  3. String? fieldName,
})

Validates minimum year.

Implementation

static String? minYear(DateTime? value, int minYear, {String? fieldName}) {
  if (value == null) return null;

  if (value.year < minYear) {
    return '${fieldName ?? "Year"} must be $minYear or later.';
  }

  return null;
}