MutableSelectionSet child objects missing selections

[pixelmatrix]

Summary

I have a mutable fragment that has relationships to other objects, like this:

fragment MutableIssueFields on Issue @apollo_client_ios_localCacheMutation {
  id
  state {
    id
    name
  }
}

Codegen ends up creating MutableIssueFields and MutableIssueFields.State. The parent object MutableIssueFields has a __selections property as you'd expect, but MutableIssueFields.State does not.

I'm trying to change the value from one "state" to another using a local cache mutation. However, when I try to load the MutableIssueFields.State object from the cache, I get an empty object because the __selections field is empty.

I'm calling it like this:

store.withinReadWriteTransaction { tx in
  let newState = try tx.readObject(ofType: MutableIssueFields.State.self, withKey: "State:\(id)")
  try tx.updateObject(ofType: MutableIssueFields.self) { obj in
    obj.state = newState
  }
}

Is this something that should be supported? If not, is there a preferred way to update this relationship to another existing object in the cache?

Version

1.14.1

Steps to reproduce the behavior

1. Create a fragment marked with @apollo_client_ios_localCacheMutation, that references some child object
2. Populate cache with data that will fulfill the fragment
3. Use a read write transaction to try to fetch the child object using readObject
4. Observe the child object is returned with empty data

Logs

No response

Anything else?

No response

[AnthonyMDev]

No your code looks correct, and this should be supported. It seems like it's a bug that the MutableIssueFields.State has an empty __selections. That shouldn't be.

We'll need to see if we can reproduce this.