@class Person;

// Dog model
@interface Dog : RLMObject
@property NSString *name;
@property Person   *owner;
@end
RLM_ARRAY_TYPE(Dog) // define RLMArray<Dog>

// Person model
@interface Person : RLMObject
@property NSString      *name;
@property NSDate        *birthdate;
@property RLMArray<Dog> *dogs;
@end
RLM_ARRAY_TYPE(Person) // define RLMArray<Person>

// Implementations
@implementation Dog
@end // none needed

@implementation Person
@end // none needed

// Dog model
class Dog: RLMObject {
    dynamic var name = ""
    dynamic var owner = Person()
}

// Person model
class Person: RLMObject {
    dynamic var name = ""
    dynamic var birthdate = NSDate(timeIntervalSince1970: 1)
    dynamic var dogs = RLMArray(objectClassName: Dog.className())
}

// Create object
Person *author = [[Person alloc] init];
author.name    = @"David Foster Wallace";

// Get the default Realm
RLMRealm *realm = [RLMRealm defaultRealm];
// You only need to do this once (per thread)

// Add to Realm with transaction
[realm beginWriteTransaction];
[realm addObject:author];
[realm commitWriteTransaction];

// Create a Person object
let author = Person()
author.name = "David Foster Wallace"

// Get the default Realm
let realm = RLMRealm.defaultRealm()

// Add to the Realm inside a transaction
realm.beginWriteTransaction()
realm.addObject(author)
realm.commitWriteTransaction()

// On the default Realm:
RLMArray *dogs = [Dog allObjects]; // retrieves all Dogs from the default Realm

// On a specific Realm
RLMRealm *petsRealm = [RLMRealm realmWithPath:@"pets.realm"]; // get a specific Realm
RLMArray *otherDogs = [Dog allObjectsInRealm:petsRealm]; // retrieve all Dogs from that Realm

// Query the default Realm
let dogs = Dog.allObjects()

// Query a specific Realm
let petsRealm = RLMRealm.realmWithPath("pets.realm")
let otherDogs = Dog.allObjectsInRealm(petsRealm)

// Using a predicate string
RLMArray *tanDogs = [Dog objectsWhere:@"color = 'tan' AND name BEGINSWITH 'B'"];

// … Or using an NSPredicate object
NSPredicate *pred = [NSPredicate predicateWithFormat:@"color = %@ AND name BEGINSWITH %@",
                                                     @"tan", @"B"];
RLMArray *tanDogs2 = [Dog objectsWithPredicate:pred];

// Query using a predicate string:
let tanDogs = Dog.objectsWhere("color = 'tan' AND name BEGINSWITH 'B'")

// Query using an NSPredicate object:
let predicate = NSPredicate(format: "color = %@ AND name BEGINSWITH %@", "tan", "B")
let tanDogs2 = Dog.objectsWithPredicate(predicate)

// Using a string (sort is ascending by default)
RLMArray *sortedDogs = [[Dog objectsWhere:@"color = 'tan' AND name BEGINSWITH 'B'"]
                    arraySortedByProperty:@"name" ascending:YES];

// Using a string (sort is ascending by default)
var sortedDogs = Dog.objectsWhere("color = 'tan' AND name BEGINSWITH 'B'").arraySortedByProperty("name", ascending: true)

RLMArray *tanDogs = [Dog objectsWhere:@"color = 'tan'"];
RLMArray *tanDogsWithBNames = [tanDogs objectsWhere:@"name BEGINSWITH 'B'"];

let tanDogs = Dog.objectsWhere("color = 'tan'")
let tanDogsWithBNames = tanDogs.objectsWhere("name BEGINSWITH 'B'")

[RLMRealm useInMemoryDefaultRealm]; 
RLMRealm *realm = [RLMRealm defaultRealm]; // Only call this line after!

// You must call this method before accessing the default Realm
RLMRealm.useInMemoryDefaultRealm()
let realm = RLMRealm.defaultRealm()

// Dog.h
@interface Dog : RLMObject
@property NSString *name;
@end

class Dog: RLMObject {
    dynamic var name = ""
}

// Dog.h
@interface Dog : RLMObject
... // other property declarations
@property Person *owner;
@end

class Dog: RLMObject {
    ... // other property declarations
    dynamic var owner = Person()    
}

Person *jim = [[Person alloc] init];
Dog    *rex = [[Dog alloc] init];
rex.owner = jim;

let jim = Person()
let rex = Dog()
rex.owner = jim

//Dog.h
@interface Dog : RLMObject
... // property declarations
@end

RLM_ARRAY_TYPE(Dog) // Defines an RLMArray<Dog> type

// Not needed in Swift

// Person.h
@interface Person : RLMObject
... // other property declarations
@property RLMArray<Dog>   *dogs;
@end

class Person: RLMObject {
    ... // other property declarations
    dynamic var dogs = RLMArray(objectClassName: Dog.className())
}

// Jim is owner of Rex and all dogs named "Fido"
RLMArray *someDogs = [Dog objectsWhere:@"name contains 'Fido'"];
[jim.dogs addObjectsFromArray:someDogs];
[jim.dogs addObject:rex];

let someDogs = Dog.objectsWhere("name contains 'Fido'")
jim.dogs.addObjectsFromArray(someDogs)
jim.dogs.addObject(rex)

// Observe Realm Notifications

self.token = [realm addNotificationBlock:^(NSString *note, RLMRealm * realm) {
    [myViewController updateUI];
}];

let token = realm.addNotificationBlock { note, realm in
    viewController.updateUI()
}

dispatch_async(queue, ^{    
    
    // Get realm and table instances for this thread
    RLMRealm *realm = [RLMRealm defaultRealm];
    
    // Break up the writing blocks into smaller portions
    // by starting a new transaction
    for (NSInteger idx1 = 0; idx1 < 1000; idx1++) {
        [realm beginWriteTransaction];
        
        // Add row via dictionary. Order is ignored.
        for (NSInteger idx2 = 0; idx2 < 1000; idx2++) {
            [Person createInRealm:realm
                       withObject:@{@"name"      : [self randomString],
                                    @"birthdate" : [self randomDate]}];
        }

        // Commit the write transaction
        // to make this data available to other threads
        [realm commitWriteTransaction];
    }
});

dispatch_async(queue) {
    // Get realm and table instances for this thread
    let realm = RLMRealm.defaultRealm()

    // Break up the writing blocks into smaller portions
    // by starting a new transaction
    for idx1 in 0..<1000 {
        realm.beginWriteTransaction()

        // Add row via dictionary. Order is ignored.
        for idx2 in 0..<1000 {
            Person.createInDefaultRealmWithObject(
                ["name": "\(idx1)", "birthdate": NSDate(timeIntervalSince1970: idx2)])
        }

        // Commit the write transaction
        // to make this data available to other threads
        realm.commitWriteTransaction()
    }
}

RLMRealm *realm = [RLMRealm defaultRealm];

// Call the API
NSData *response = [ [NSData alloc] initWithContentsOfURL:
                     [NSURL URLWithString:@"https://api.foursquare.com/v2/venues/search?near=San%20Francisco&limit=50"]];

// Deserialize the response to JSON
NSDictionary *json = [[ NSJSONSerialization
                        JSONObjectWithData:response
                        options:kNilOptions
                        error:&error ] objectForKey:@"response"];

// Call the API
let url = NSURL(string: "https://api.foursquare.com/v2/venues/search?near=San%20Francisco&limit=50")
let response = NSData(contentsOfURL: url)

// De-serialize the response to JSON
let json = NSJSONSerialization.JSONObjectWithData(response,
    options: NSJSONReadingOptions(0),
    error: nil)["response"]

// Venue.h
@interface Venue : RLMObject
@property NSString *id;
@property NSString *name;
@property Contact  *contact;
@property Location *location;
@end
RLM_ARRAY_TYPE(Venue)

// Contact.h
@interface Contact : RLMObject
@property NSString *phone;
@end
RLM_ARRAY_TYPE(Contact)

// Location.h
@interface Location : RLMObject
@property double lat; // latitude
@property double lng; // longitude
@property NSString *postalCode;
@property NSString *cc;
@property NSString *state;
@property NSString *country;
@end
RLM_ARRAY_TYPE(Location)

class Contact: RLMObject {
    dynamic var phone = ""
}

class Location: RLMObject {
    dynamic var lat = 0.0  // latitude
    dynamic var lng = 0.0  // longitude
    dynamic var postalCode = ""
    dynamic var cc = ""
    dynamic var state = ""
    dynamic var country = ""
}

class Venue: RLMObject {
    dynamic var id = ""
    dynamic var name = ""
    dynamic var contact = Contact()
    dynamic var location = Location()
}

//Extract the array of venues from the response
NSArray *venues = json[@"venues"];

[realm beginWriteTransaction];
// Save one Venue object (and dependents) for each element of the array
for (NSDictionary *venue in venues) {
    [Venue createInDefaultRealmWithObject:venue];
}
[realm commitWriteTransaction];

//Extract the array of venues from the response
let venues = json["venues"] as [NSDictionary]

realm.beginWriteTransaction()
// Save one Venue object (and dependents) for each element of the array
for venue in venues {
    Venue.createInDefaultRealmWithObject(venue)
}
realm.commitWriteTransaction()

@interface Person : RLMObject
@property NSString *firstName;
@property NSString *lastName;
@property int age;
@end

class Person: RLMObject {
    dynamic var firstName = ""
    dynamic var lastName = ""
    dynamic var age = 0
}

@interface Person : RLMObject
@property NSString *fullName;
@property int age;
@end

class Person: RLMObject {
    dynamic var fullName = ""
    dynamic var age = 0
}

// Inside your [AppDelegate didFinishLaunchingWithOptions:]

RLMMigrationBlock migrationBlock = ^NSUInteger(RLMMigration *migration,
                                                 NSUInteger oldSchemaVersion) {
  // We haven’t migrated anything yet, so oldSchemaVersion == 0
  if (oldSchemaVersion < 1) { 
    // Nothing to do!
    // Realm will automatically detect new properties and removed properties
    // And will update the schema on disk automatically
  }
  // Return the latest version number (always set manually)
  // Must be a higher than the previous version or an RLMException is thrown
  return 1;
};

// Apply the migration block above to the default Realm
[RLMRealm migrateDefaultRealmWithBlock:migrationBlock];

// Inside your application(application:didFinishLaunchingWithOptions:)

let migrationBlock: RLMMigrationBlock = { migration, oldSchemaVersion in
  if oldSchemaVersion < 1 {
  // Nothing to do!
    // Realm will automatically detect new properties and removed properties
    // And will update the schema on disk automatically
  }
  // Return the latest version number (always set manually)
  // Must be a higher than the previous version or an RLMException is thrown
  return 1
}

// Apply the migration block above to the default Realm
RLMRealm.migrateDefaultRealmWithBlock(migrationBlock)

// Inside your [AppDelegate didFinishLaunchingWithOptions:]

// Perform a migration defining the migration block inline
[RLMRealm migrateDefaultRealmWithBlock:^NSUInteger(RLMMigration *migration, NSUInteger oldSchemaVersion) {
  // We haven’t migrated anything yet, so oldSchemaVersion == 0
  if (oldSchemaVersion < 1) { 
    // The enumerateObjects:block: method iterates
    // over every 'Person' object stored in the Realm file
    [migration enumerateObjects:Person.className
                          block:^(RLMObject *oldObject, RLMObject *newObject) {    
      
      // combine name fields into a single field
      newObject[@"fullName"] = [NSString stringWithFormat:@"%@ %@",
                                         oldObject[@"firstName"],
                                         oldObject[@"lastName"]];          
    }];
  }
  // Return the latest version number (always set manually)
  // Must be a higher than the previous version or an RLMException is thrown
  return 1;
}];

// Inside your application(application:didFinishLaunchingWithOptions:)

// Perform a migration defining the migration block inline
RLMRealm.migrateDefaultRealmWithBlock { migration, oldSchemaVersion in
  if oldSchemaVersion < 1 {
    // The enumerateObjects:block: method iterates
    // over every 'Person' object stored in the Realm file
    migration.enumerateObjects(Person.className()) { oldObject, newObject in
      // combine name fields into a single field
      let firstName = oldObject["firstName"] as String
      let lastName = oldObject["lastName"] as String
      newObject["fullName"] = "\(firstName) \(lastName)"
    }
  }
  // Return the latest version number (always set manually)
  // Must be a higher than the previous version or an RLMException is thrown
  return 1
}

// v0
@interface Person : RLMObject
@property NSString *firstName;
@property NSString *lastName;
@property int age;
@end

// v1
@interface Person : RLMObject
@property NSString *fullName; // new property
@property int age;
@end

// v2
@interface Person : RLMObject
@property NSString *fullName;
@property NSString *email;   // new property
@property int age;
@end

// v0
class Person: RLMObject {
    dynamic var firstName = ""
    dynamic var firstName = ""
    dynamic var age = 0
}

// v1
class Person: RLMObject {
    dynamic var fullName = "" // new property
    dynamic var age = 0
}

// v2
class Person: RLMObject {
    dynamic var fullName = ""
    dynamic var email = "" // new property
    dynamic var age = 0
}

[RLMRealm migrateDefaultRealmWithBlock:^NSUInteger(RLMMigration *migration, NSUInteger oldSchemaVersion) {
    // The enumerateObjects:block: method iterates
    // over every 'Person' object stored in the Realm file
    [migration enumerateObjects:Person.className block:^(RLMObject *oldObject, RLMObject *newObject) {

        // Add the 'fullName' property only to Realms with a schema version of 0
        if (oldSchemaVersion < 1) {
            newObject[@"fullName"] = [NSString stringWithFormat:@"%@ %@",
                                      oldObject[@"firstName"],
                                      oldObject[@"lastName"]];
        }

        // Add the 'email' property to Realms with a schema version of 0 or 1
        if (oldSchemaVersion < 2) {
            newObject[@"email"] = @"";
        }
    }];
    // Return the latest version number (always set manually)
    // Must be a higher than the previous version or an RLMException is thrown
    return 2;
}];

RLMRealm.migrateDefaultRealmWithBlock { migration, oldSchemaVersion in
  // The enumerateObjects:block: method iterates
  // over every 'Person' object stored in the Realm file
  migration.enumerateObjects(Person.className()) { oldObject, newObject in
    // Add the 'fullName' property only to Realms with a schema version of 0
    if oldSchemaVersion < 1 {
      let firstName = oldObject["firstName"] as String
      let lastName = oldObject["lastName"] as String
      newObject["fullName"] = "\(firstName) \(lastName)"
    }

    // Add the 'email' property to Realms with a schema version of 0 or 1
    if oldSchemaVersion < 2 {
        newObject[@"email"] = ""
    }
  }
  // Return the latest version number (always set manually)
  // Must be a higher than the previous version or an RLMException is thrown
  return 2
}