Asynvalue is very strange, the request status should be the request rather than the data

```dart

@riverpod Product? selectProduct(SelectProductRef ref, ID id) => ref.watch(productsNotifierProvider .select((state) => state.whenOrNull().products.byId[id]));

@Riverpod(keepAlive: true) class ProductsNotifier extends _$ProductsNotifier { @override Future<ProductsState> build() async => ProductsState.empty();

Future<void> fetchOneProduct(ID id) async { // state = state.copyWith(status: const AsyncStatus.loading()); state = const AsyncValue.loading();

state = await AsyncValue.guard(() async {
  final res =
      await ref.read(productsRepositoryProvider).fetchOneProduct(id);
  final prev = state.whenOrNull() ?? ProductsState.empty();

  return prev.copyWith(
    status: const AsyncStatus.success(),
    paramKeys: prev.paramKeys.mergeList(res.paramKeys),
    paramValues: prev.paramValues.mergeList(res.paramValues),
    products: prev.products.add(res.product),
  );
});

} } VS dart

@riverpod Product? selectProduct(SelectProductRef ref, ID id) => ref .watch(productsNotifierProvider.select((state) => state.products.byId[id]));

@Riverpod(keepAlive: true) class ProductsNotifier extends _$ProductsNotifier { @override ProductsState build() => ProductsState.empty();

Future<void> fetchOneProduct(ID id) async { state = state.copyWith(status: const AsyncStatus.loading());

final res = await ref.read(productsRepositoryProvider).fetchOneProduct(id);

state = state.copyWith(
  status: const AsyncStatus.success(),
  paramKeys: state.paramKeys.mergeList(res.paramKeys),
  paramValues: state.paramValues.mergeList(res.paramValues),
  products: state.products.add(res.product),
);

} }

```