Quickstart

Holy smokes you're here! Let's do this. We're going to be short on words and quick on code in this quickstart.

1. Add dependencies

First, add Isar to your project. Add the following packages to your pubspec.yaml. Always use the latest version.

dependencies:
  isar: $latest
  isar_flutter_libs: $latest # contains the binaries (not required for web)

dev_dependencies:
  isar_generator: $latest
  build_runner: any

Replace $latest with the latest Isar version.

For non-Flutter projects, you need to manually include the Isar Core binaries.

2. Annotate classes

Annotate your classes with @Collection and choose an id field.

part 'contact.g.dart';

@Collection()
class Contact {
  @Id()
  int? id;

  late String name;
}

3. Run code generator

Execute the following command to start the build_runner:

dart run build_runner build

If you are using Flutter, try:

flutter pub run build_runner build

4. Open Isar instance

This opens an Isar instance at a valid location.

final dir = await getApplicationSupportDirectory();

final isar = await Isar.open(
  schemas: [ContactSchema],
  directory: dir.path,
);

5. Write and read from database

Once your instance is open, you can start using the database.

final contact = Contact()
  ..name = "My first contact";

await isar.writeTxn((isar) async {
  contact.id = await isar.contacts.put(contact);
});

final allContacts = await isar.contacts.where().findAll();

Other resources

You're a visual learner? Check out this great series to get started with Isar: