Cloud firestore trigger query by documentID for array of ids - node.js

Question

I am trying to write a transaction that first query documents by documentId from a list of ids, then makes some updates.
I am getting the error:
The corresponding value for FieldPath.documentId() must be a string or a DocumentReference.
For example:
const indexArray = [..list of doc ids...]
const personQueryRef = db.collection("person").where(admin.firestore.FieldPath.documentId(), "in", indexArray)
return db.runTransaction(transaction => {
return transaction.get(personQueryRef).then(personQuery => {
return personQuery.forEach(personRef => {
transaction.update(personRef, { ...update values here })
//more updates etc
})
})
})
I am wanting to do this in an onCreate and onUpdate trigger. Is there another approach I should be taking?
Update
The error still persists when not using a transaction, so this is unrelated to the problem.
The problem does not occur when the query is .where(admin.firestore.FieldPath.documentId(), "==", "just_one_doc_id"). So, the problem is with using FieldPath.documentId() and in.

Answer 1

It sounds like the type of query you're trying to do just isn't supported by the SDK. Whether or not that's intentional, I don't know. But if you want to transact with multiple documents, and you already know all of their IDs, you can use getAll(...) instead:
// build an array of DocumentReference objects
cost refs = indexArray.map(id => db.collection("person").doc(id))
return db.runTransaction(transaction => {
// pass the array to getAll()
return transaction.getAll(refs).then(docs => {
docs.forEach(doc => {
transaction.update(doc.ref, { ...update values here })
})
})
})