How can I use a lazy var in Swift and Realm?

Question

I have a lazy var in Swift like:

import Realm

class DataUser: RLMObject {

@objc dynamic lazy var id: String = self.myId()

@objc dynamic var firstTime: Int = 0

@objc dynamic var position: Int = 0

private func myId() -> String {
        return “\(firstTime)\(position)”
}

I’m getting this message:

** Terminating app due to uncaught exception 'RLMException', reason: 'Lazy managed property 'id' is not allowed on a Realm Swift object class. Either add the property to the ignored properties list or make it non-lazy.'

What is the correct way to use a lazy-variable in Swift and Realm?

Thanks!

Possibly Duplicate of this https://stackoverflow.com/questions/38010548/compound-key-in-realm-with-lazy-property — Khushbu Desai, Aug 24 '18 at 07:15
Possible duplicate of [Compound key in Realm with lazy property](https://stackoverflow.com/questions/38010548/compound-key-in-realm-with-lazy-property) — Dávid Pásztor, Aug 27 '18 at 13:31
The suggested duplicate doesn't actually answer the question of how to ignore a managed property (or make it non managed), but rather deals with compound properties, which this doesn't seem to be. — David Berry, Aug 27 '18 at 21:49

score 0 · Answer 1 · edited Jul 29 '20 at 06:42

0

I believe you can use ignoreProperties() method for creating lazy var

Swift code:

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

edited Jul 29 '20 at 06:42

Dima Kozhevin

3,602
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answered Jul 29 '20 at 06:20

Qriti

1
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score -1 · Answer 2 · answered Aug 24 '18 at 07:21

-1

You can directly use dynamic lazy var id: String = self.myId() also, and I don't think that your implementation is wrong. But Realm seems to not handling properly as your id is lazy. you can see bug report about the same also.

answered Aug 24 '18 at 07:21

kchopda

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How can I use a lazy var in Swift and Realm?

2 Answers2