CODEWITHSUNDEEP
javafirebasegoogle-cloud-firestore
vesii
vesii

Reputation: 3138

How to remove a Document Reference in list with WriteBatch?

I'm using Firebase Cloud database. This question is similar to the previous one but now I'm interested in DocumentReferences. I queried a collection and got a list of documents. Each document contains a field cars which contains DocumentReferences. Each DocumentReference references a document that represents a car. Given the carsPath which is a path to the car document, I want to remove the DocumentReferences in that list. I'm using WriteBatch. If cars would contain just the paths, it would be easy by using:

batch.update(snapshot.getReference(), "cars", FieldValue.arrayRemove(carPath));

Is there a way to do something similar if we have DocumentReferences instead of Strings?

Upvotes: 0

Views: 51

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317958

Just pass DocumentReference object instead of a string to FieldValue.arrayRemove(). The path of the reference must match exactly what's in the array.

Upvotes: 1

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