Firebase: Use converter in transaction with Firestore

I am trying to use a Firestore data converter inside a transaction where I am adding a record to a collection (entries) and updating a counter in another collection (users). However, I cannot figure out how to use the converter inside a transaction, and have been unable to find any examples. While the Firebase docs are typically excellent, they seem to fall a bit short with regards to transactions.

// Add new entry and increment user entry counter  async addEntry(entry: Entry): Promise<void> {      const entryRef = db.collection("entries").doc(entry.id);      const userRef = db.collection("user").doc(entry.userId);        await db.runTransaction(async (transaction) => {        // NOTE: Cannot use converter with transaction???        await transaction.set(entryRef, entry).withConverter(entryConverter);          // QUESTION: Is this a proper use of "increment" (ie. inside a transaction)?        await transaction.update(userRef, { entries: FieldValue.increment(1) });      });  }  

This is what it would look like without the transaction and using a converter (but I need the transaction).

await db.collection("entries")    .doc(entry.id)    .withConverter(entryConverter)    .set(entry);  await db.collection("users")    .doc(entry.userId)    .update({ entries: FieldValue.increment(1) });  

How can I safely perform these two operations in a transaction while using a converter for the new data?

https://stackoverflow.com/questions/66095432/firebase-use-converter-in-transaction-with-firestore February 08, 2021 at 11:06AM