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final config = Configuration.local([Person.schema, Scooter.schema]);
final realm = Realm(config);
// Add scooter owned by Mace Windu
final maceWindu = Person(ObjectId(), "Mace", "Windu");
final purpleScooter =
    Scooter(ObjectId(), "Purple scooter", owner: maceWindu);
realm.write(() {
  realm.add(purpleScooter);
});
// Create frozen snapshot of realm
final frozenRealm = realm.freeze();
// Update data in the realm
final quiGonJinn = Person(ObjectId(), "Qui-Gon", "Jinn");
realm.write(() {
  purpleScooter.owner = quiGonJinn;
});
// Data changes not in the frozen snapshot
final purpleScooterFrozen =
    frozenRealm.query<Scooter>("name == \$0", ["Purple scooter"]).first;
print(purpleScooterFrozen.owner!.firstName); // prints 'Mace'
// You must also close the frozen realm before exiting the process
frozenRealm.close();

// Add data to the realm
final maceWindu = Person(ObjectId(), "Mace", "Windu");
final jocastaNu = Person(ObjectId(), "Jocasta", "Nu");
realm.write(() => realm.addAll([maceWindu, jocastaNu]));
// Get RealmResults and freeze data
final people = realm.all<Person>();
final frozenPeople = people.freeze();
// Update data in the non-frozen realm
final newLastName = "Foo";
realm.write(() {
  for (var person in people) {
    person.lastName = newLastName;
  }
});
// Data changes not in the frozen snapshot
final frozenFooPeople =
    frozenPeople.query("lastName == \$0", [newLastName]);
print(frozenFooPeople.length); // prints 0
// You must also close the frozen realm associated
// with the frozen RealmResults before exiting the process
frozenPeople.realm.close();

final person = realm.query<Person>(
    'firstName == \$0 AND lastName == \$1', ["Count", "Dooku"]).first;
// Freeze RealmObject
final frozenPerson = person.freeze();
// Change data in the unfrozen object.
realm.write(() {
  realm.delete(person);
});
// Frozen person snapshot still exists even though data deleted
// in the unfrozen realm
print(frozenPerson.isValid); // prints true
print(person.isValid); // prints false
// You must also close the frozen realm associated
// with the frozen RealmObject before exiting the process
frozenPerson.realm.close();

final firstPerson =
    realm.query<Person>("firstName = \$0", ["Yoda"]).first;
// Freeze RealmList in a RealmObject
final firstPersonAttributesFrozen = firstPerson.attributes.freeze();
// Change data in the unfrozen realm
final newAttribute = "quick";
realm.write(() {
  // Append item to list
  firstPerson.attributes.add(newAttribute);
});
final index = firstPersonAttributesFrozen.indexOf(newAttribute);
print(index); // prints -1 because cannot find new attribute
// You must also close the frozen realm associated
// with the frozen RealmList before exiting the process
firstPersonAttributesFrozen.realm.close();

// You can check if all freezable types are frozen
// with the `isFrozen` property.
final realm = Realm(config);
print(realm.isFrozen);
final people = realm.all<Person>();
print(people.isFrozen);
final firstPerson =
    realm.query<Person>("firstName = \$0", ["Yoda"]).first;
print(firstPerson.isFrozen);
final firstPersonAttributes = firstPerson.attributes;
print(firstPersonAttributes.isFrozen);