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Flutter – Retrieve the firestore document id after creation

I need to get and save the document Id from a newly created document. How do I return this id from the Future or how do I add the docRef.id to the client provider?

  Future<void> saveNewClient(client) async {
    try {
      DocumentReference docRef = await _db.collection('client').add(client);
      client.updateClientId(docRef.id);  <<<< CLIENT PROVIDER
    } catch (e) {
      print(e);
    }
    return;
  }

This code does not throw an error but it never reaches the client.updateClientId(docRef.id) line. The save works so I should be able to get the docRef.id.

Why is this line being skipped?

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2

Answers


  1. 0

    After creating a document, you can retrieve its document ID from the DocumentReference object returned by the add() method.

    Future<void> createDocument() async {

FirebaseFirestore firestore = FirebaseFirestore.instance;

DocumentReference docRef =
  await firestore.collection('YOUR_COLLECTION_NAME').add(YOUR_MAP).then(
(docRef) {
  print('${docRef.id}');
},
 );}
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  2. 0

    There are a few ways to achieve this depending your preference or use case

     Future<String?> saveNewClient(client) async {
    FirebaseFirestore _db = FirebaseFirestore.instance;
    try {

      /// You can generate a document id before the create operate
      String id = _db.collection("client").doc().id;

      /// pass the generated id to the doc reference and set it
      /// .toMap() -> Assuming your client isn't of type map
      await _db.collection('client').doc(id).set(client.toMap());
      /// upon success return the id
      return id;
    } catch (e) {
      print(e);
      /// or return null if the operation failed
      return null;
    }
  }
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