Firestore - How to update a field that contains period(.) in it's key from Android?

Question

Updating a field contains period (.) is not working as expected. In docs, nested fields can be updated by providing dot-seperated filed path strings or by providing FieldPath objects. So if I have a field and it's key is "com.example.android" how I can update this field (from Android)?

In my scenario I've to set the document if it's not exists otherwise update the document. So first set is creating filed contains periods like above and then trying update same field it's creating new field with nested fields because it contains periods.

db.collection(id).document(uid).update(pkg, score)

Answer 1

What you want to do is possible:

FieldPath field = FieldPath.of("com.example.android");
db.collection(collection).document(id).update(field, value);