Mapped data classes do not work with Boolean fields

iOS
1

I have a table with a Boolean column. When I use a mapped class to this data type in Swift, with Bool? fields, they are always nil regardless of the column value in the cloud.

If I use NSNumber? datatypes in the Swift code they work.

Do Bool? not work in Swift ?

2

Hi Ian,

I just tried and was able to reproduce the error. I am scheduling a “blocker” ticket which will be fixed asap.

Regards,
Mark

3

Hi Ian,

The properties of Integer, Floating and Boolean type MUST be initialized, they MAY NOT be Optional (?):

class Comment: NSObject
{
var objectId: String?
var message: String?
var isPublished: Bool = false
}

class OrderItem : NSObject {

var ownerId : String?
var itemName : String?
var price : Double = 0.0
var quantity = 0;
var byCredit: Bool = false

}

Regards,
Slava

4

But Boolean columns can be null in the database, so shouldn’t they be nullable on the client too. Are you saying that you can’t use nullable Boolean columns. I have been using them in Parse as a trip state, where null means something different from both true and false.

5

Using NSNumber? works fine in this case?

6

Yes it does but makes the code “in clean”. It becomes misleading and is just asking for bugs if it’s a Bool? Then that’s what should be used.

7

We will investigate this problem asap, but now you should use initialized numeric OR NSNumber? - it is your choice

8

Ian,

The current requirement is not the final solution, it is more of a temporary workaround due to how we perform reflection on the serialized objects.

Regards,
Mark

9

Thanks. Just out of interest, How can I track the bug so I know When it’s resolved and can go back and update my code?

10

If a bug report came through support, we update each ticket with a notification that it is fixed.

11

Hi Ian,

You shouldn’t use Bool?, Int?, Double?, Float? in your data model classes.
Foundation provides a bridge from Bool to NSNumber (as well as bridges for Int, Double, etc.), but it does not provide a bridge for Bool? , etc. That’s why it is not visible to Objective-C (Backendless SDK is implemented in Objective-C).

So, this is WRONG class:

class WrongNumerics : NSObject {
    var logic : Bool?
    var count : Int?
    var real : Double?
    var afloat : Float?
}

and here is RIGHT class:

class RightNumerics : NSObject {
    var logic : Bool = false
    var count : Int = 0
    var real : Double = 0.0
    var afloat : Float = 0.0
}

Regards,
Slava