“The operator '[]' isn't defined” error when using .data[] in flutter firestore

Question

I am learning to use firestore in flutter following Net Ninja\'s tutorial on youtube. After user authenticatin was done this guy added user records to the database whenever

Answer 1

Change this:

name: doc.data['name'] ?? '' 

Into this:

name: doc.data()['name'] ?? '' 

data() is a method now therefore you have to add (), from the source code:

  Map data() {
    return _CodecUtility.replaceDelegatesWithValueInMap(
        _delegate.data(), _firestore);
  }

https://github.com/FirebaseExtended/flutterfire/blob/master/packages/cloud_firestore/cloud_firestore/lib/src/document_snapshot.dart#L38