If I have an @Model object and I try to add a default/initial value to it, my code no longer compiles:
var createdAt: Date // compiles
var createdAt: Date = Date.now // fails
it gives me this error:
Variable 'self._$backingData' used before being initialized
this worked fine in Xcode b5, but is failing in b6
The same question
I believe they want us to set default values inside the initializer of the model and because
@Model requires an initializer be provided for 'MyModel'
I think it is fine
+1, SwiftData Sync via Cloud needs default values, so this doesn't work in Xcode 15 beta 6
I have the same issue. Working fine on xCode B5, but now begins to fail with aforementioned error on B6.
I see the same issue and already submitted a feedback: FB12905731
Same issue here
I think this relates to this issue mentioned in the release notes of Xcode Beta 6:
@Model classes with initial values for stored properties result in an error that self._$backingData is used before being initialized. (113572344) Workaround: Assign initial values to stored properties in the body of an initializer. For example, instead of this code: [...]
Same problem here, can not compile with initial values, but if not set, can not open the container at runtime. I used to avoid this problem in Core Data by making all properties optional and providing non-optional calculated properties for ease of use.
I'm on Xcode 15 beta 6 and simply removing the default values caused the model container to crash.
Making the properties optional worked for me.
According to the Xcode 15 Beta 7 Release Notes:
SwiftData
Resolved Issues
- Fixed: @Model classes with initial values for stored properties result in an error that self._$backingData is used before being initialized. (113572344)
New builds with the new Xcode beta should not run into those issues.
I think, its all because SwiftData is only can be used in iOS 17+, so if you project not, you get this error