CODEWITHSUNDEEP
iosswiftrealm
Bhavin Bhadani
Bhavin Bhadani

Reputation: 22374

Realm @count query issue

I have tried to use the @count function to get data according to that but it somehow crashed without crash report.

Here is the code

class PSMedia: Object {
    @objc dynamic var id = ""

    @objc dynamic var promotional_status = false

    var promotions = List<String>()
}

And here is that query that caused an issue

realm.objects(PSMedia.self).filter("promotions.@count <= 5")

What's wrong here? I have followed realm swift doc and used the @count function same as described in that doc.

Upvotes: 1

Views: 551

Answers (1)

Jay
Jay

Reputation: 35648

I am pretty sure @count does not work on Lists of primitives. Realm didn't used to support lists of primitives at all, it now does but there is some missing functionality.

EDIT: Release 10.7 added support for filters/queries as well as aggregate functions on primitives so the below info is no longer completely valid. However, it's still something to be aware of.

Change your promotions to be a list of other realm objects

class PromotionClass: Object {
   @objc dynamic var promotion = ""
}

and then

class PSMedia: Object {
    @objc dynamic var id = ""
    @objc dynamic var promotional_status = false
    let promotions = List<PromotionClass>()
}

then this will work

realm.objects(PSMedia.self).filter("promotions.@count <= 5")

EDIT

Yep, that's correct. It's not supported. Here's the Github link for that issue

Swift docs should make it clear that filtering by someListOfPrimitives.@count isn't supported #6079

Upvotes: 1

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