realm Getting started with realm

Remarks

Versions

Java

public class Dog extends RealmObject { public String name; public int age; } Dog dog = new Dog(); dog.name = "Rex"; dog.age = 1; Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { realm.copyToRealmOrUpdate(dog); } }); RealmResults<Dog> pups = realm.where(Dog.class) .lessThan("age", 2) .findAll();  

Objective-C

@interface Dog : RLMObject @property NSString *name; @property NSInteger age; @end @implementation Dog @end Dog *dog = [Dog new]; dog.name = @"Rex"; dog.age = 1; RLMRealm *realm = [RLMRealm defaultRealm]; [realm transactionWithBlock:^{ [realm addObject:dog]; }]; RLMResults<Dog *> *allDogs = [Dog allObjects]; RLMResults<Dog *> *pups = [allDogs objectsWhere:@"age < 2"];  

React-Native

class Dog {} Dog.schema = { name: 'Dog', properties: { name: 'string', age: 'int', } }; let realm = new Realm(); realm.write(() => { realm.create('Dog', {name: 'Rex', age: 1}); }); let pups = realm.objects('Dog').filtered('age > 2');  

Swift

Create Object Class:

class Dog: Object { dynamic var name = "" dynamic var age = 0 }  

Assign Object's Values:

let dog = Dog() dog.name = "Rex" dog.age = 1  

Save Object:

let realm = try! Realm() try! realm.write { realm.add(dog) }  

Reading Objects:

let realm = try! Realm() let pups = realm.objects(Dog.self)  

Filtering Objects:

let realm = try! Realm() let filteredPups = realm.objects(Dog.self).filter("age < 2")  

Counting Objects:

let realm = try! Realm() let pupsCount = realm.objects(Dog.self).count  

Xamarin

public class Dog : RealmObject { public string Name { get; set; } public int Age { get; set; } } var realm = Realm.GetInstance(); realm.Write(() => { var mydog = realm.CreateObject<Dog>(); mydog.Name = "Rex"; mydog.Age = 1; }); var pups = realm.All<Dog>().Where(d => d.Age < 2);  

PDF - Download realm for free