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swiftswiftuirealm

Update Realm objects - SwiftUI

I need to update all the objects in the database, when I try it, it says:

Thread 1: "Attempting to modify a frozen object - call thaw on the Object instance first."

I have the following:

@ObservedRealmObject var meal: MealTracking
@ObservedResults(MealTracking.self) var mealTracking

mealTracking is the one that contains everything and meal is the single object in the current view.

So once I update the name on that single object (meal), I want to update the name on all other objects. So I'm doing:

for (index, meal) in self.mealTracking.enumerated() {
    $mealTracking.wrappedValue[index].mealName = ""
}

and I get the error of not being able to update the objects.

I also tried it like $mealTracking[index].mealName.wrappedValue = "" and gives another error: Referencing subscript 'subscript(_:)' requires wrapped value of type 'Results<MealTracking>'

For a the single object on the current view I can update it with:

$meal.mealName.wrappedValue = "some stuff", the problem is when attempting to update All objects

How can I update all the objects?

Solution

  • @ObservedRealmObject is a frozen object. If you want to modify the properties of an @ObservedRealmObject directly in a write transaction, you must .thaw() it first.

    In your case something like :

    mealName.thaw()?.name = ""

    More information :

    https://www.mongodb.com/docs/realm/sdk/swift/swiftui/

    https://www.mongodb.com/community/forums/t/freeze-frozen-objects-and-thawing/15706/5