hive 1.4.1+1

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Fast, Enjoyable & Secure NoSQL Database

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Hive is a lightweight and blazing fast key-value database written in pure Dart. Inspired by Bitcask.

Documentation & Samples 📖 #

Features #

  • 🚀 Cross platform: mobile, desktop, browser
  • ⚡ Great performance (see benchmark)
  • ❤️ Simple, powerful, & intuitive API
  • 🔒 Strong encryption built in
  • 🎈 NO native dependencies
  • 🔋 Batteries included

Getting Started #

Check out the Quick Start documentation to get started.

Usage #

You can use Hive just like a map. It is not necessary to await Futures.

var box ='myBox');

box.put('name', 'David');

var name = box.get('name');

print('Name: $name');

Store objects #

Hive not only supports primitives, lists and maps but also any Dart object you like. You need to generate a type adapter before you can store objects.

@HiveType(typeId: 0)
class Person extends HiveObject {

  String name;

  int age;

Extending HiveObject is optional but it provides handy methods like save() and delete().

var box = await Hive.openBox('myBox');

var person = Person() = 'Dave'
  ..age = 22;

print(box.getAt(0)); // Dave - 22

person.age = 30;;

print(box.getAt(0)) // Dave - 30

Hive ❤️ Flutter #

Hive was written with Flutter in mind. It is a perfect fit if you need a lightweight datastore for your app. After adding the required dependencies and initializing Hive, you can use Hive in your project:

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

class SettingsPage extends StatelessWidget {
  Widget build(BuildContext context) {
    return ValueListenableBuilder(
      builder: (context, box, widget) {
        return Switch(
          value: box.get('darkMode'),
          onChanged: (val) {
            box.put('darkMode', val);

Boxes are cached and therefore fast enough to be used directly in the build() method of Flutter widgets.

Benchmark #

1000 read iterations1000 write iterations
SharedPreferences is on par with Hive when it comes to read performance. SQLite performs much worse.Hive greatly outperforms SQLite and SharedPreferences when it comes to writing or deleting.

The benchmark was performed on a Oneplus 6T with Android Q. You can run the benchmark yourself.

*Take this benchmark with a grain of salt. It is very hard to compare databases objectively since they were made for different purposes.

Licence #

Copyright 2019 Simon Leier

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.

1.4.1+1 #

Other #

  • Added docs to all public members

1.4.1 #

Enhancements #

  • Minor performance improvements

Fixes #

  • When a database operation failed, subsequent operations would not be performed

Other #

  • Fixed GitHub homepage path

1.4.0+1 #

Enhancements #

  • Minor performance improvements

Fixes #

  • Allow more versions of crypto

1.4.0 #

Enhancements #

  • ~1000% encryption / decryption performance improvement
  • Added option to implement custom encryption algorithm
  • Added box.valuesBetween(startKey, endKey)
  • Allow tree shaking to drop encryption engine if no encryption is used

Fixes #

  • Hive.deleteBoxFromDisk() did not work for boxes with upper-case names

More #

  • Deprecated encryptionKey parameter. Use Hive.openBox('name', encryptionCipher: HiveAesCipher(yourKey)).
  • Dropped pointycastle dependency
  • Dropped path dependency

1.3.0 #

Use latest version of hive_generator

Breaking changes #

  • TypeAdapters and @HiveType() now require a typeId
  • Hive.registerAdapter() does not need a typeId anymore.
  • Removed BinaryReader.readAsciiString()
  • Removed BinaryWriter.writeAsciiString()

Enhancements #

  • New documentation with tutorials and live code

Fixes #

  • box.clear() resets auto increment counter

More #

  • Not calling Hive.init() results in better exception

1.2.0 #

Breaking changes #

  • Removed the Hive.path getter
  • Removed Hive.openBoxFromBytes() (use the bytes parameter of Hive.openBox() instead)
  • LazyBox and Box now have a common parent class: BoxBase
  • Lazy boxes need to be opened using Hive.openLazyBox()
  • Open lazy boxes can be acquired using Hive.lazyBox()
  • Box name bug resolved (more information below)

Enhancements #

  • Support for relationships, HiveLists (see docs for details)
  • Support for inheritance
  • Lazy boxes can now have a type argument LazyBox<YourModel>
  • Added method to delete boxes without opening them Hive.deleteBoxFromDisk()
  • Added path parameter to open boxes in a custom path
  • Improved documentation

Fixes #

  • HiveObjects have not been initialized correctly in lazy boxes
  • Fixed bug where uppercase box name resulted in an uppercase filename
  • Fixed compaction bug which caused corrupted boxes
  • Fixed bug which did not allow the key 0xFFFFFFFF
  • Fixed bug where not all BoxEvents have been broadcasted

More #

  • Changed type of encryptionKey from Uint8List to List<int>

Important: #

Due to a bug in previous Hive versions, boxes whose name contains uppercase characters were stored in a file that also contains upper case characters (e.g. 'myBox' -> 'myBox.hive').

To avoid different behavior on case sensitive file systems, Hive should store files with lower case names. This bug has been resolved in version 1.2.0.

If your box name contains upper case characters, the new version will not find a box stored by an older version. Please rename the hive file manually in that case.
This also applies to the web version.

1.1.1 #

Breaking changes #

  • object.delete() now throws exception if object is not stored in a box

Fixes #

  • Fixed bug where would fail on subsequent calls

1.1.0+2 #

Fixes #

  • Fixed bug that it was not possible to open typed boxes (Box<E>)

1.1.0+1 #

Fixes #

  • Fixed bug that corrupted boxes were not detected

1.1.0 #

Breaking changes #

  • Changed return type of addAll() from List<int> to Iterable<int>.
  • Removed the option to register TypeAdapters for a specific box. E.g. box.registerTypeAdapter().
  • getAt(), putAt(), deleteAt() and keyAt() no longer allow indices out of range.

Enhancements #

  • Added HiveObject
  • Boxes have now an optional type parameter Box<E>
  • Support opening boxes from assets

Fixes #

  • Fixed bug which was caused by not awaiting write operations
  • Fixed bug where custom compaction strategy was not applied
  • Hive now locks box files while they are open to prevent concurrent access from multiple processes

More #

  • Improved performance of putAll(), deleteAll(), add(), addAll()
  • Changed values parameter of addAll() from List to Iterable
  • Improved documentation
  • Preparation for queries

1.0.0 #

  • First stable release

0.5.1+1 #

  • Change keys parameter of deleteAll from List to Iterable
  • Fixed bug in BinaryWriter

0.5.1 #

  • Fixed Hive.init() bug in browser
  • Fixed a bug with large lists or strings
  • Improved box opening time in the browser
  • Improved general write performance
  • Improved docs
  • Added integration tests

0.5.0 #

  • Added keyComparator parameter for custom key order
  • Added isEmpty and isNotEmpty getters to box
  • Added support for reading and writing subclasses
  • Removed length limitation for Lists, Maps, and Strings
  • Greatly improved performance of storing Uint8Lists in browser
  • Removed CRC check in the browser (not needed)
  • Improved documentation
  • TypeIds are now allowed in the range of 0-223
  • Fixed compaction
  • Fixed writing longer Strings
  • Breaking: Binary format changed

0.4.1+1 #

  • Document all public APIs
  • Fixed flutter_web error

0.4.1 #

  • Allow different versions of the path package

0.4.0 #

  • Added BigInt support
  • Added compactionStrategy parameter
  • Added automatic crash recovery
  • Added add() and addAll() for auto-increment keys
  • Added getAt(), putAt() and deleteAt() for working with indices
  • Support for int (32 bit unsigned) keys
  • Non-lazy boxes now notify their listeners immediately about changes
  • Bugfixes
  • More tests
  • Breaking: Open boxes with openBox()
  • Breaking: Writing null is no longer equivalent to deleting a key
  • Breaking: Temporarily removed support for transactions. New API design needed. Will be coming back in a future version.
  • Breaking: Binary format changed
  • Breaking: API changes

0.3.0+1 #

  • Bugfix: Hive['yourBox'] didn't work with uppercase box names

0.3.0 #

  • Big step towards stable API
  • Support for transactions
  • Annotations for hive_generator
  • Bugfixes
  • Improved web support
  • Breaking: inMemory -> lazy
  • Breaking: Binary format changed

0.2.0 #

  • Support for dart2js
  • Improved performance
  • Added inMemory option
  • Breaking: Minor API changes
  • Breaking: Changed Endianness to little
  • Breaking: Removed Migrator

0.1.1 #

  • Downgrade to meta: ^1.1.6 to support flutter

0.1.0 #

  • First release


import 'dart:io';

import 'package:hive/hive.dart';

part 'main.g.dart';

@HiveType(typeId: 1)
class Person {
  String name;

  int age;

  List<String> friends;

  String toString() {
    return '$name: $age';

void main() async {
  var path = Directory.current.path;

  var box = await Hive.openBox('testBox');

  var person = Person() = 'Dave'
    ..age = 22
    ..friends = ['Linda', 'Marc', 'Anne'];

  await box.put('dave', person);

  print(box.get('dave')); // Dave: 22

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  hive: ^1.4.1+1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:hive/hive.dart';
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Learn more about scoring.

We analyzed this package on Jun 5, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.2
  • pana: 0.13.8-dev


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.6.0 <3.0.0
crypto >=2.1.0 <3.0.0 2.1.5
meta ^1.1.7 1.1.8
Transitive dependencies
charcode 1.1.3
collection 1.14.12
convert 2.1.1
typed_data 1.1.6
Dev dependencies
dartx >=0.2.0 <1.0.0
mockito ^4.1.1
path ^1.6.4
pedantic ^1.9.0
pointycastle ^1.0.2
test ^1.9.4