flutter: how can I retrieve current user data from firebase firestore - flutter

Question

am trying to retrieve current user data but it showing all the users data from firestore in app
here is my code
Widget build(BuildContext context){
CollectionReference users = FirebaseFirestore.instance.collection('users');
return FutureBuilder<DocumentSnapshot>(
future: users.doc(documentId).get(),
builder: ((context, snapshot){
if(snapshot.connectionState == ConnectionState.done){
Map<String, dynamic> data =
snapshot.data!.data() as Map<String, dynamic>;
return Container(
child: Column(
children: [
Text('Email : '"${data['Email name'].toString()}",
style: const TextStyle(fontWeight: FontWeight.bold,wordSpacing: 10),),
const SizedBox(
width: 10,
),
Text('Contact : '"${data['age'].toString()}",
style: const TextStyle(fontWeight: FontWeight.bold,wordSpacing: 10),),
const SizedBox(
width: 10,
),
Text('Name : '"${data['firstname'].toString()}",
style: const TextStyle(fontWeight: FontWeight.bold,wordSpacing: 10),),
const SizedBox(
width: 10,
),
Text('Last Name : '"${data['lastname'].toString()}",
style: const TextStyle(fontWeight: FontWeight.bold,wordSpacing: 10),),
const SizedBox(
width: 10,
),
],
),
);
}
return const Text('Loading');
}),
here is documentId code
List<String> docIDs = [];
Future getDocId() async{
await FirebaseFirestore.instance.collection('users').get().then(
(snapShot) => snapShot.docs.forEach(
(documant){
print(documant.reference);
docIDs.add(documant.reference.id);
}));
}
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// ignore: prefer_const_constructors
Text('SignUp as ${user!.email!}',style: TextStyle(
fontSize: 20,
),),
Expanded(child: FutureBuilder(
future: getDocId(),
builder: (context, snapshot){
return ListView.builder(
itemCount: docIDs.length,
itemBuilder: (context, index){
return ListTile(
title: GetuserData(documentId: docIDs[index]),
);
},
);
},
))
when ever user post the form it submitted successfully and generate a post like summited form history but it showing to others users to but i wont it for only current user how to do that please any one can help me

Answer 1

You can use firestore query to return the current user using where()
on getDocId():
await FirebaseFirestore.instance.collection('users').get()
change to
await FirebaseFirestore.instance.collection('users')
.where('Email name', isEqualTo: 'myEmail#mail.test').get()
you can replace the email with your or consider using parameter to pass user email dynamically.