更新 firebase flutter 中用户的数据

Question

I want to get the ID of a firebase object, but i can't think of a solution to store in a string variable, i only can reach here (witch is to get the id in a text widget form lmao)

static getUserDocId() {
  return StreamBuilder<QuerySnapshot>(
    stream: FirebaseFirestore.instance
        .collection('users')
        .where('idUser', isEqualTo: FirebaseAuth.instance.currentUser!.uid)
        .snapshots(),
    builder: (context, AsyncSnapshot<QuerySnapshot> snapshot) {
      if (!snapshot.hasData) return Container();
      return Text(
        snapshot.data!.docs[0].id,
        style: headline1,
      );
    },
  );
}

Don't know if i have to change to futurebuilder or what.

Answer 1

What do you mean by logged? and screen? are you using firebase auth? could use a little more explanation.

But If you want to update the firebase user document you will need to access the doc by its id.

await FirebaseFirestore.instance.collection('users').doc({document_id}).update(
 {
  'typeContact': _selectedContact,
  'contact': _contactController.text,
 },
)

Might find this page helpful https://firebase.flutter.dev/docs/firestore/usage#updating-documents

Please clarify the question.