Function score result in inaccurate score

[Alan_Lam1 (Alan Lam)]

@alison_quintana

 "score": {
    "function": {
      "constant": {
        "value": 1
      },
      "boost": {
        "value": { "path": "items.ordering" }
      }
    }
  }

it doesn’t seem to work as MongoDB documentation for modifying scores in Atlas Search shows that the boost and constant options cannot be used together.

Regarding to the " Use a Single Field for Scoring", may i know that is it possible to sort on a field from a matched child document of an embeddedDocument? like sorting directly on item.ordering.

Thanks a lot