RxRealm

Usage

This library is a very thin wrapper around the reactive collection types that RealmSwift provides.

The extension adds to Results, List, LinkingObjects and AnyRealmCollection these methods:

asObservable()

asObservable() - emits every time the collection changes:

let realm = try! Realm()
realm.objects(Lap).asObservable()
  .map {laps in "\(laps.count) laps"}
  .subscribeNext { text  in
    print(text)
  }

asObservableArray()

asObservableArray() - fetches the a snapshot of a Realm collection and converts it to an array value (for example if you want to use array methods on the collection):

let realm = try! Realm()
realm.objects(Lap).asObservableArray()
  .map {array in
    return array.prefix(3) //slice of first 3 items
  }
  .subscribeNext { text  in
    print(text)
  }

asObservableChangeset()

asObservableChangeset() - emits every time the collection changes and provides the exact indexes that has been deleted, inserted or updated:

let realm = try! Realm()
realm.objects(Lap).asObservableChangeset()
  .subscribeNext {result, changes in
    if let changes = changes {
	  //it's an update
	  print(result)
	  print("deleted: \(changes.deleted) inserted: \(changes.inserted) updated: \(changes.updated)")
	} else {
	  //it's the initial data
	  print(result)
	}
  }

asObservableArrayChangeset()

asObservableArrayChangeset() combines the result of asObservableArray() and asObservableChangeset() returning an Observable<Array<T>, RealmChangeset?>.

Example app

To run the example project, clone the repo, and run pod install from the Example directory first. The app uses RxSwift, RxCocoa using RealmSwift, RxRealm to observe Results from Realm.

Further you're welcome to peak into the RxRealmTests folder of the example app, which features the library's unit tests.

Installation

This library depends on both RxSwift and RealmSwift 0.100+.

CocoaPods

RxRealm is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "RxRealm"

Carthage

Feel free to send a PR

As Source

You can grab the RxRealm.swift file from this repo and include it in your project.

TODO

• Carthage
• Add asObservable() to the Realm class
• Test add platforms and add compatibility for the pod

License

This library belongs to RxSwiftCommunity.

RxRealm is available under the MIT license. See the LICENSE file for more info.