Computed sum property doesn't work on backlinks. Is this expected?

[TheHyphen]

I have a simple ESDL file:

module default {
    type Parent {
        property name -> str;
        multi link children := .<parent[is Child];
        property total := sum(.children.someNumber);
    }

    type Child {
        required link parent -> Parent;
        required property someNumber -> int64;
    }
}

When I try edgedb migrations create, it fails with:

error: object type 'default::Child' has no link or property 'someNumber'

As you can see, the someNumber property does exist on type Child. Either I messed up with the syntax somewhere or the error message is not very descriptive.

Any help would be great!

[TheHyphen]

oh, looks like it's an ordering bug. Just declaring the Child type before Parent type solved the issue:

module default {
    type Child {
        required link parent -> Parent;
        required property someNumber -> int64;
    }

    type Parent {
        property name -> str;
        multi link children := .<parent[is Child];
        property total := sum(.children.someNumber);
    }
}

I think this is already being tracked as mentioned here. Sorry about additional spam!