RealmBinding.swift

public class ModelObject: Object {

    @objc public override func setValue(_ value: Any?, forKey key: String) {
        // make sure we begin a write transaction if this is a managed object
        self.realm?.beginWrite()

        // actually do the update
        super.setValue(value, forKey: key)

        // commit the write transaction if managed
        // this will crash if the write fails, in the real world you'd want to use do { } catch { }
        try! self.realm?.commitWrite()
    }

}