How to recover a specific data in the firestore? - flutter

Question

I have this structure in the database:
I have a function that return the current user logged
FirebaseAuth auth = FirebaseAuth.instance;
auth.currentUser.uid;
And i want to retrieve "requisicoes" when "idUser" == auth.currentUser.uid;
Basically, the user retrieves the requests created by himself.
That's my StreamBuilder
final _controller = StreamController<QuerySnapshot>.broadcast();
FirebaseFirestore db = FirebaseFirestore.instance;
StreamBuilder<QuerySnapshot> addListenersRequests() {
final stream = db
.collection("requisicoes")
.where("usuario.idUser", isEqualTo: idUsuarioLogado)
.snapshots();
stream.listen((dados) {
_controller.add(dados);
});
return null;
}
Note: idUsuarioLogado is returning correctly currentUser
The problem is that I am getting everything in the "requisicoes" collection, when I create a new user, other users' requests appear on the screen
is there a logic problem in StreamBuilder?

Answer 1

As per you problem ,I think you are fetching the data of your current logged uid .But You want to retrieve the details of particulers users created(i,e documendId) . Then you have to fetch documentId first.Like
body: StreamBuilder(
stream:users.snapshots(),
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return Center(
child: CircularProgressIndicator(),
);
}
if(!snapshot.hasData){
return Center(
child: CircularProgressIndicator(),
);
}
return ListView(
children: snapshot.data.documents.map((document) {
return Center(
child: Container(
width: MediaQuery.of(context).size.width/2.5,
height: MediaQuery.of(context).size.height/5,
child: Text(document.id),
),
);
}).toList());
}),
You have to fetch document.id. This is your particuler user instead of this.
FirebaseAuth auth = FirebaseAuth.instance;
auth.currentUser.uid;
Note: This will return you current logged userId.
For more details gothrough thislink.

Answer 2

I found the answer here Firestore is ignoring the where clause in the query in flutter
My example is the same as the link above, I have two functions, one addListenersRequests() and the other getCurrentUser(), these two functions I was calling in the initState method, the problem is that getCurrentUser is async, so addListenersRequests () was being executed first, before the value of the variable idUsuarioLogado is filled.
So I merged the two functions into one, so that getCurrentUser can be executed first
Final code:
Future<StreamBuilder<QuerySnapshot>> addListenersRequests() async{
await getDataUser();
final stream = db
.collection("requisicoes")
.where("usuario.idUser", isEqualTo: idUsuarioLogado)
.snapshots();
stream.listen((dados) {
_controller.add(dados);
});
return null;
}
Now it is working correctly.
The strange thing about this story is that the firebase executes the clause and retrieves everything in the collection even when the referenced variable is null