message method

@override String message(ValidationContext context)

Returns the validation error message.

Implementation

@override
String message(ValidationContext context) {
  final value = context.value;
  if (value is List<UploadedFile> && value.isEmpty) {
    return 'file_required_validation';
  }
  // Check for specific filename errors if we could pass context info,
  // but generic 'file_validation' is okay, or we can add specific errors.
  return 'file_validation';
}