realm 3.2.0 realm: ^3.2.0 copied to clipboard
The official Realm SDK for Flutter. Realm is a mobile database - an alternative to SQLite and key-value stores.
// Copyright 2021 MongoDB, Inc.
// SPDX-License-Identifier: Apache-2.0
// ignore_for_file: avoid_print
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:realm/realm.dart';
part 'main.realm.dart';
@RealmModel()
class _Car {
late String make;
String? model;
int? kilometers = 500;
_Person? owner;
}
@RealmModel()
class _Person {
late String name;
int age = 1;
}
void main() {
print("Current PID $pid");
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
late Realm realm;
_MyAppState() {
final config = Configuration.local([Car.schema, Person.schema]);
realm = Realm(config);
}
int get carsCount => realm.all<Car>().length;
@override
void initState() {
var myCar = Car("Tesla", model: "Model Y", kilometers: 1);
realm.write(() {
print('Adding a Car to Realm.');
var car = realm.add(Car("Tesla", owner: Person("John")));
print("Updating the car's model and kilometers");
car.model = "Model 3";
car.kilometers = 5000;
print('Adding another Car to Realm.');
realm.add(myCar);
print("Changing the owner of the car.");
myCar.owner = Person("me", age: 18);
print("The car has a new owner ${car.owner!.name}");
});
print("Getting all cars from the Realm.");
var cars = realm.all<Car>();
print("There are ${cars.length} cars in the Realm.");
var indexedCar = cars[0];
print('The first car is ${indexedCar.make} ${indexedCar.model}');
print("Getting all Tesla cars from the Realm.");
var filteredCars = realm.all<Car>().query("make == 'Tesla'");
print('Found ${filteredCars.length} Tesla cars');
super.initState();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: Center(
child: Text('Running on: ${Platform.operatingSystem}.\n\nThere are $carsCount cars in the Realm.\n'),
),
),
);
}
}