A collection of snippets to speed up your development using Hive as a database in Dart with/without Flutter.

hive_service_snippet.dart

import 'dart:developer';
import 'package:hive/hive.dart';

/// A simple class to store as static strings your boxes names
class HiveClassName {
  static const String user = "user";
}

/// I often add those lines:
///  try {
///     Hive.openBox<T>(className);
///  } catch (e) {
///     log(e.toString());
///  }
///
/// It is just in case your boxes close
/// due to something or a delete you made before

class HiveService {
  Future<void> save<T extends HiveObject>(
    T data,
    String className, {
    int index = 0,
  }) async {
    try {
      await Hive.openBox<T>(className);
    } catch (e) {
      log(e.toString());
    }
    Box<T> box = Hive.box(className);
    if (box.isNotEmpty) {
      await box.putAt(index, data);
    } else {
      await box.add(data);
    }
  }

  T? readData<T extends HiveObject>(
    String className, {
    int index = 0,
  }) {
    try {
      Hive.openBox<T>(className);
    } catch (e) {
      log(e.toString());
    }
    Box<T> box = Hive.box(className);
    T? data = box.getAt(index);
    return data;
  }

  List<T>? readDatas<T extends HiveObject>(String className) {
    try {
      Hive.openBox<T>(className);
    } catch (e) {
      log(e.toString());
    }
    Box<T> box = Hive.box(className);
    List<T>? data = box.values.toList();
    return data;
  }

  Future<void> deleteBoxes<T>(String className) async {
    try {
      Box<T> box = Hive.box(className);
      await box.deleteFromDisk();
    } catch (e) {
      log(e.toString());
    }
  }
}