Validating a File value

import 'dart:typed_data';

import 'package:luthor/luthor.dart';

void main() {
  final validator = l.file();
  print(validator.validateValue(Uint8List.fromList([1, 2, 3]))); // Success
  print(validator.validateValue('not-a-file')); // Error
}

import 'dart:typed_data';

import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:luthor/luthor.dart';

part 'file_schema.freezed.dart';
part 'file_schema.g.dart';

@luthor
@freezed
abstract class FileSchema with _$FileSchema {
  const factory FileSchema({
    @isFile /* OR @IsFile() */ required Object profileImage,
    String? description,
  }) = _FileSchema;

  factory FileSchema.fromJson(Map<String, dynamic> json) =>
      _$FileSchemaFromJson(json);
}

void main() {
  final result = $FileSchemaValidate({
    'profileImage': Uint8List.fromList([1, 2, 3]),
    'description': 'Avatar upload',
  });

  switch (result) {
    case SchemaValidationSuccess(data: final data):
      print('✅ Valid: ${data.description}');
    case SchemaValidationError(errors: final errors):
      print('❌ Errors: $errors');
  }
}

l.file() validates common file-like values such as File, MultipartFile, XFile, Uint8List, and ByteData.

When using code generation, apply @IsFile() (or @isFile) to fields that should use file validation.