Can I get the generated ID for a document created with batch().set using Firestore?

Question

Is there a way that I can get the auto-generated ID for a document created as part of a batch using Firestore?

When using .add() I can easily get an ID:

Answer 1

In order to generate the uid automatically beforehand the creation of document, you can make use of createID() function from angularFireAuth as follows:

`

constructor(
    private angularFireStore: AngularFirestore,
   ) {}

 const batch = this.angularFireStore.firestore.batch();

 const autogenUid = this.angularFireStore.createId();
 const collectionReference = this.angularFireStore.collection
                            ('collection_name').doc(autogenUid).ref;

 const docData = {first_field:'value', second_field:'value2'};
 batch.set(collectionReference, docData);