firstWhereOrNull method

  1. @override
Future<TModel?> firstWhereOrNull(
  1. Filter<ModelBase> where(
    1. TMeta t
    ), {
  2. Iterable<ColumnDefinition<TModel, dynamic>>? select(
    1. TMeta t
    )?,
  3. List<OrmOrder<ModelBase>>? orderBy(
    1. TMeta t
    )?,
  4. int? offset,
  5. bool? useIsolate,
  6. Map<String, dynamic>? isolateArgs,
  7. void onIsolatePreMap(
    1. Map<String, dynamic>? isolateArgs
    )?,
})

Implementation

@override
Future<TModel?> firstWhereOrNull(
  Filter Function(TMeta t) where, {
  Iterable<ColumnDefinition<TModel, dynamic>>? Function(TMeta t)? select,
  List<OrmOrder>? Function(TMeta t)? orderBy,
  int? offset,
  bool? useIsolate,
  Map<String, dynamic>? isolateArgs,
  void Function(Map<String, dynamic>? isolateArgs)? onIsolatePreMap,
}) async {
  final customSelect = select?.call(t)?.toList();
  if (customSelect != null && customSelect.isEmpty) {
    throw ArgumentError('no select columns supplied');
  }

  final records = await getItems() ?? {};
  final filters = where(t).filters;
  final res = records.entries.firstWhereOrNull((element) {
    return _where(element, filters);
  });
  if (res != null) {
    return mType.load(res.value as Map<String, dynamic>) as TModel;
  }
  return null;
}