I am trying to add a new document in a firestore transaction with version 9 of the Firebase JS SDK. In version 8, we can use
const newDocRef = db.collection('coll').doc();
to get a DocumentReference to a document that does not exist yet, and then do a
transaction.set(newDocRef, { ... });
to set the document in a transaction.
How would we do the same in version 9? The new CollectionReference class does not seem have a doc() method as in version 8.
Thanks!
There's a function doc() to create a DocumentReference and then runTransaction() to run a transaction. Try refactoring the code like this:
import { getFirestore, doc, runTransaction } from "firebase/firestore"
const newDocRef = doc(db, "col_name", "doc_id");
await runTransaction(db, async (transaction) => {
// ...
transaction.set(newDocRef, { ...data });
});
The documentation has examples with both the name-spaced and functional syntax. Also checkout this answer for better explanation of syntax differences in V8 and V9:
Firestore: What's the pattern for adding new data in Web v9?