Box not found. Did you forget to call Hive.openBox()?

Question

When working with HIVE database in flutter. If you ever get error like this:

"Box not found. Did you forget to call Hive.openBox()?"

It means you haven't opened your box to

To resolve this issue call

await Hive.openBox("boxname");

before using the box

When you post a question, it gives you the option to answer your question. Make sure to check that and you should post an answer at least to make it clear that it's answered. Make sure to mark it as accepted. — Benjamin, Dec 21 '19 at 14:25

score 20 · Accepted Answer · answered Dec 21 '19 at 15:09

20

It means you haven't opened your box. To resolve this issue call

await Hive.openBox("boxname");

before using the box.

answered Dec 21 '19 at 15:09

Alexander van Oostenrijk

4,644
3
23
37

1

what is the box name? – Kamrujjaman Joy Aug 03 '21 at 13:15
final recentSearchs = Hive.box(AppConstants.resentSearchTag); How can I solve there the issue – Kamrujjaman Joy Aug 03 '21 at 13:24

score 1 · Answer 2 · answered Jan 22 '23 at 15:14

1

You have to open the box you want to use and make sure to use await while using the openBox() function.

await Hive.openBox("boxname");

answered Jan 22 '23 at 15:14

Imran Sefat

528
4
6

score 0 · Answer 3 · answered Jan 05 '23 at 16:39

The box needs to be open either at the beginning, after database initialization or right before doing the operation on the box.

For example in my AppDatabase class I have only one box ('book') and I open it up in the initialize() method, like below:

The whole application and tutorial is here.

const String _bookBox = 'book';

@Singleton()
class AppDatabase {
  AppDatabase._constructor();

  static final AppDatabase _instance = AppDatabase._constructor();

  factory AppDatabase() => _instance;

  late Box<BookDb> _booksBox;

  Future<void> initialize() async {
    await Hive.initFlutter();
    Hive.registerAdapter<BookDb>(BookDbAdapter());
    _booksBox = await Hive.openBox<BookDb>(_bookBox);
  }

  Future<void> saveBook(Book book) async {
    await _booksBox.put(
    book.id,
    BookDb(
      book.id,
      book.title,
      book.author,
      book.publicationDate,
      book.about,
      book.readAlready,
    ));
  }

  Future<void> deleteBook(int id) async {
    await _booksBox.delete(id);
  }

  Future<void> deleteAllBooks() async {
    await _booksBox.clear();
 }
}

score 0 · Answer 4 · answered Jun 03 '23 at 20:39

I got this exception because I moved Hive initialization in a separate function and called it without await.

It was like this (working):

void main() async {
  await Hive.initFlutter();
  await Hive.openBox('box');
  runApp(
    const ProviderScope(child: MainApp()),
  );
}

Became like this (exception):

void main() async {
  initHive();  // should be await initHive();
  runApp(
    const ProviderScope(child: MainApp()),
  );
}
initHive() async {
    await Hive.initFlutter();
    await Hive.openBox('box');
}

Without await the application does not wait for Future to complete and tries to look inside the box which is not yet opened.

Box not found. Did you forget to call Hive.openBox()?

4 Answers4

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