realm-notes

gistfile1.txt

Parts of the doc that I don't want to forget ...

# finding a realm file - so you can view in Realm Browser
# link: https://realm.io/docs/swift/latest/#finding-a-realm-file
 
in lldb ... po Realm.Configuration.defaultConfiguration.fileURL
in terminal open the above path
 
# seperate realms for different users
# link: https://realm.io/docs/swift/latest/#other-realms

let config = Realm.Configuration(
    // Get the URL to the bundled file
    fileURL: NSBundle.mainBundle().URLForResource("MyBundledData", withExtension: "realm"),
    // Open the file in read-only mode as application bundles are not writeable
    readOnly: true)

// Open the Realm with the configuration
let realm = try! Realm(configuration: config)

// Read some data from the bundled Realm
let results = realm.objects(Dog.self).filter("age > 


# configuring migrations
# linke: https://realm.io/docs/swift/latest/#migrations

// Inside your application(application:didFinishLaunchingWithOptions:)

let config = Realm.Configuration(
  // Set the new schema version. This must be greater than the previously used
  // version (if you've never set a schema version before, the version is 0).
  schemaVersion: 1,

  // Set the block which will be called automatically when opening a Realm with
  // a schema version lower than the one set above
  migrationBlock: { migration, oldSchemaVersion in
    // 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
    }
  })

// Tell Realm to use this new configuration object for the default Realm
Realm.Configuration.defaultConfiguration = config

// Now that we've told Realm how to handle the schema change, opening the file
// will automatically perform the migration
let realm = try! Realm()


# error handling
# link: https://realm.io/docs/swift/latest/#error-handling

do {
  let realm = try Realm()
} catch let error as NSError {
  // handle error
}