Class Projection Notifications on sub objects

[alexjameslittle]

How frequently does the bug occur?

Always

Description

We are unable to observe a projection and successfully get it to fire when a deeply nested property changes. Is this expected behaviour?

Stacktrace & log output

No response

Can you reproduce the bug?

Always

Reproduction Steps

Models:

class TestObject: Object {
    @Persisted(primaryKey: true) var id: String
    @Persisted var sub: TestSub?
}

class TestSub: Object {
    @Persisted var sub: TestSubSub?
}

class TestSubSub: Object {
    @Persisted var name: String = "test"
}

class TestProjection: Projection<TestObject> {
    @Projected(\TestObject.sub?.sub?.name) var name
}

Observer:

let token = await projection.observe(on: MainActor.shared) { _, _ in
            expectation.fulfill()
        }

Using the above objects and observation block, if you write to the "name" property, the observation on TestProjection is not notified.

Version

10.40.0

What Atlas Services are you using?

Local Database only

Are you using encryption?

No

Platform OS and version(s)

iOS 16

Build environment

Xcode version: 14.3.1
Dependency manager and version: SPM

[dianaafanador3]

Hi @alexjameslittle thanks for taking the time to open an issue. I tested your sample code and like you mentioned this doesn't seem to be working correctly. On the meantime I'll recommend using key paths for observing properties within a Projection that links to an object with nested properties. We'll take a look at the issue and let you know of any updates.

[dianaafanador3]

Hi @alexjameslittle I was finally able to found the issue and I'm working on a PR which solves it #8298

[alexjameslittle]

That's great news! Thanks @dianaafanador3