Firebase Database collection of a specific user

Question

I'm developing my first flutter APP, however i'm really newbie such on firebase and in flutter.

my app is already authenticating on firebase through email and password, but I only know how to display the db collection to all the users,I would like to display the specific data of the logged user.

for now Im getting this error

Class 'DocumentSnapshot' has no instance getter 'documents'. Receiver: Instance of 'DocumentSnapshot' Tried calling: documents

but when i call documents its shows a new error: The method 'documents' isn't defined for the type 'CollectionReference'. Try correcting the name to the name of an existing method, or defining a method named 'documents'.

MY signIn CODE

signIn() async {
    if (_formKey.currentState.validate()) {
      _formKey.currentState.save();



      try {
            getData() async{
          String user = (await FirebaseAuth.instance.currentUser).uid;
          return Firestore.instance.collection('users').document(user);
        }
        UserCredential user = await FirebaseAuth.instance

            .signInWithEmailAndPassword(email: _email, password: _password);



            getUserDoc();


        Navigator.push(

            context, MaterialPageRoute(builder: (context) => Home()));


      }
      catch (e) {
        print(e.message);
      }
    }
  }
} 

home Page CODE

import 'dart:typed_data';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:dio/dio.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:esys_flutter_share/esys_flutter_share.dart';
import 'dart:io';
import 'package:http/http.dart';
import 'package:flutter_cached_pdfview/flutter_cached_pdfview.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:path_provider/path_provider.dart';
import 'package:image_viewer/image_viewer.dart';








class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {

  int _currentIndex = 0;

  Stream<DocumentSnapshot> getDatabase() async* {
    FirebaseUser user = await FirebaseAuth.instance.currentUser;
    yield* Firestore.instance
        .collection('users')
        .document(user.uid)
        .snapshots();
  }



  final tabs = [

    //TAB DE MANUAIS
    Center(
        child: (Scaffold(
            body: StreamBuilder (

                stream: FirebaseFirestore.instance.collection('users').document('user.uid').snapshots(),
                builder: (context, snapshot) {
                  if (snapshot.data == null) return CircularProgressIndicator();

                  return Container(
                    padding: EdgeInsets.all(16),
                    child: ListView.builder(
                        itemCount: snapshot.data.documents.length,
                        itemBuilder: (context, index) {
                          DocumentSnapshot manuais =
                          snapshot.data.documents[index];




                          var dio = Dio();


                          return Card(
                            color: Colors.grey[250],
                            child: Container(
                              padding: EdgeInsets.all(10),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,

                                children: <Widget>[

                                    new Image.asset('Images/pdflogo.png', width: 32,
                                    ),
                                  Center(
                                    child: Text(
                                      (manuais.data()['nome'].toString()),
                                      maxLines: 1,
                                      overflow: TextOverflow.ellipsis,
                                      style: TextStyle(fontSize: 16),

                                    ),
                                  ),

                                  ButtonBar(
                                    children: <Widget>[

                                        FlatButton(
                                          child: const Text('Compartilhar / Download'),
                                            onPressed: () async {
                                              var request = await HttpClient().getUrl(Uri.parse(manuais.data()['documento']));
                                              var response = await request.close();Uint8List bytes = await consolidateHttpClientResponseBytes(response);
                                              await Share.file(
                                                  'ESYS AMLOG',
                                                  'Manual.pdf',
                                                  bytes,
                                                  'image/jpg');
                                            }),





                                          ],
                                  ),
                                ],
                              ),
                            ),
                          );
                        }),
                  );
                })))),

    //TAB DE PRODUCAO
    Center(
        child: (Scaffold(
            body: StreamBuilder(
                stream: FirebaseFirestore.instance.collection('producao').snapshots(),
                builder: (context, snapshot) {
                  if (snapshot.data == null) return CircularProgressIndicator();

                  return Container(
                    padding: EdgeInsets.all(16),
                    child: ListView.builder(
                        itemCount: snapshot.data.documents.length,
                        itemBuilder: (context, index) {
                          DocumentSnapshot producao =
                          snapshot.data.documents[index];

                          return Card(
                            color: Colors.grey[250],
                            child: Container(
                              padding: EdgeInsets.all(10),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: <Widget>[
                                  Center(
                                    child: Image.network(producao.data()['img'].toString(), width: 260,
                                    ),

                                  ),
                                  Text(
                                    (producao.data()['data'].toString()),
                                    maxLines: 1,
                                    overflow: TextOverflow.ellipsis,
                                    style: TextStyle(fontSize: 22),
                                  ),
                                  Text(
                                    (producao.data()['detail'].toString()),
                                    style: TextStyle(fontSize: 16),
                                  ),
                                  ButtonBar(
                                    children: <Widget>[

                                      FlatButton(
                                          child: const Text('DETALHES'),
                                          onPressed: () {
                                            ImageViewer.showImageSlider(
                                              images: [
                                                (producao.data()['img']),
                                                //List of images' URLs
                                              ],
                                            );




                                          }),
                                      FlatButton(
                                          child: const Text('COMPARTILHAR'),
                                          onPressed: () async {

                                            var request = await HttpClient().getUrl(Uri.parse(producao.data()['img']));
                                            var response = await request.close();Uint8List bytes = await consolidateHttpClientResponseBytes(response);

                                            await Share.file(
                                                'ESYS AMLOG',
                                                'amlog.jpg',
                                                bytes,
                                                'image/jpg'
                                            );
                                          }),
                                    ],
                                  ),
                                ],
                              ),
                            ),
                          );
                        }),
                  );
                })))),
    Center(child: Text('Documentos')),
  ];

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(title: Text('Área do Cliente')),
      body: tabs[_currentIndex],
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: _currentIndex,
        type: BottomNavigationBarType.shifting,
        iconSize: 28,
        items: [
          BottomNavigationBarItem(
              icon: Icon(Icons.picture_as_pdf),
              title: Text('Manuais'),
              backgroundColor: Colors.indigo),
          BottomNavigationBarItem(
              icon: Icon(Icons.build),
              title: Text('Produção'),
              backgroundColor: Colors.indigo),
          BottomNavigationBarItem(
            icon: Icon(Icons.folder),
            title: Text('Documentos'),
            backgroundColor: Colors.indigo,
          )
        ],
        onTap: (index) {
          setState(() {
            _currentIndex = index;
          });
        },
      ),
    );
  }
}

```

Answer 1

This is the sample that you can get the child value :

 FirebaseFirestore.instance.collection('users').document('user.uid').then((DataSnapshot snapshot) {
      if(snapshot.value != null){
        setState(() {
         String firebaseText=snapshot.value['your key name'].toString();
        });
      }

Answer 2

FirebaseFirestore.instance.collection('users').document('user.uid').snapshots()

This particular line is returning just 1 document. It does not give you a list of documents. Now a document will have several fields - Key:Value pairs. It can also have a collection.
To access the fields by keys, use snapshot.data[key]. It will return the corresponding value