Ignored properties and simple swift properties

Question

What is the difference in behavior of using ignored properties and just using simple swift property?

I need to add properties to realm object which should not be save to DB. Realm provides "ignored properties" but if I just write properties with ordinary swift style, it should't be saved to DB. Is there difference in behavior?

// Ignored propery
class Person: Object {
  dynamic var tmpID = 0

  override static func ignoredProperties() -> [String] {
    return ["tmpID"]
  }
}


// Normal swift property
class Person: Object {
      var tmpID = 0 // Realm supported class but with no dynamic
      var myClassObj = MyCustomClass() // Class realm does not support
 }

Answer 1

You seem to e comparing ignoredProperties with these two things

• a swift property without dynamic
• a property that is of a type not supported by Realm

For the first kind, Realm seems to still store these in the database.

class MyObject: Object {
    dynamic var string = ""
    var normalString = ""
}

And the database:

This is because dynamic is just a way to tell swift to use dynamic dispatch in the Objective-C runtime, which allows the properties to be updated dynamically at runtime.

For the second kind, Realm seems to ignore your custom classes that are not Realm Objects.