Using a base model with objectId no longer works with SwiftBackendless

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Backendless Version (3.x / 5.x, Online / Managed / Pro )

Newest Online version

Client SDK (REST / Android / Objective-C / Swift / JS )


Application ID


Expected Behavior

Please describe the expected behavior of the issue, starting from the first action.

  1. I create a base class that contains objectId, created, and updated
  2. I subclass this base class for my models
  3. The properties in the base class will be populated when fetching data

Actual Behavior

Please provide a description of what actually happens, working from the same starting point.

Be descriptive: “it doesn’t work” does not describe what the behavior actually is – instead, say “the request returns a 400 error with message XXX”. Copy and paste your logs, and include any URLs.

  1. When I fetch data for a class that subclasses my base class, the base class properties always return nil.
  2. If I explicitly include the property (ie objectId) in the class, then it is populated as expected
  3. This behaviour used to work in ObjC

Reproducible Test Case

Please provide a simple code that could be run in a new clean app and reproduce the issue.


@objcMembers class STBaseModel: NSObject {

public var objectId: String!

public var created: NSDate!

public var updated: NSDate?


Table Class:

@objcMembers class STCompany: STBaseModel {

public var name: String!

public var sheets: [STSheet]?


If the issue is more complex or requires configuration, please provide a link to a project on Github that reproduces the issue.

This issue has been fixed. Please update to the Swift-SDK v5.5.2 and verify whether it works fine.