ChangeNotifierProviderを使ったModelの状態管理ができない

実現したいこと

以下のようにFireStoreに登録をしたいです。

-attendaces
　 -uid
　   -uid
　   -name
　   -createdAt
　   -attendance

以下Modelファイルです

Dart
1import 'package:cloud_firestore/cloud_firestore.dart';
2import 'package:firebase_auth/firebase_auth.dart';
3import 'package:flutter/material.dart';
4
5class QRModel extends ChangeNotifier {
6  // final uidController = TextEditingController();
7  // final nameController = TextEditingController();
8  // final attendanceController = TextEditingController();
9
10  String? uid;
11  String? name;
12  String? attendance;
13
14  bool isLoading = false;
15
16  void startLoading() {
17    isLoading = true;
18    notifyListeners();
19  }
20
21  void endLoading() {
22    isLoading = false;
23    notifyListeners();
24  }
25
26  void setUid(String uid) {
27    this.uid = uid;
28    notifyListeners();
29  }
30
31  void setName(String name) {
32    this.name = name;
33    notifyListeners();
34  }
35
36  void setAttendance(String attendance) {
37    this.attendance = attendance;
38    notifyListeners();
39  }
40
41  Future signUp() async {
42    // this.uid = uidController.text;
43    //this.name = nameController.text;
44    //this.attendance = attendanceController.text;
45
46    var user = FirebaseAuth.instance.currentUser;
47
48    if (user != null) {
49      print(uid);
50      // firestoreに追加
51      final doc = FirebaseFirestore.instance.collection('attendaces').doc(uid);
52      await doc.set({'createdAt': Timestamp.now()}, SetOptions(merge: true));
53      await doc.set({
54        'uid': uid,
55        'name': name,
56        // 'timeStamp': timeStamp,
57        'attendance': attendance,
58      });
59    }
60  }
61}
62

変更を伝えるファイル

このファイルでChangeNotifierProviderでmodelに変数の値を渡したいのですが
TextFieldのように動的にTextを変えるのではなく、currentUserの定数？を
どこかでセットしたいです。
TextFieldを一応試しましたが上手くいかなかったので遷移なしで値を渡せる方法はありますでしょうか？

Dart
1import 'package:attendanc_management_app/scan_qr_code/qr_model.dart';
2import 'package:cloud_firestore/cloud_firestore.dart';
3import 'package:firebase_auth/firebase_auth.dart';
4import 'package:flutter/material.dart';
5import 'package:provider/provider.dart';
6import '../mypage/my_model.dart';
7
8class AttendaveRegister extends StatelessWidget {
9
10  String? uid;
11  String? email;
12  String? name;
13  String? attendance;
14  final currentUser = FirebaseAuth.instance.currentUser;
15
16  @override
17  Widget build(BuildContext context) {
18    this.uid = currentUser!.uid;
19    this.email = currentUser!.email;
20    this.name = currentUser!.displayName;
21    this.timeStamp = DateTime.now().millisecondsSinceEpoch;
22    var dateNow =
23        DateFormat('MM/dd kk:mm').format(Timestamp.now().toDate()).toString();
24    this.attendance = "出席";
25
26    return ChangeNotifierProvider<QRModel>(
27      create: (_) => QRModel(),
28      child: Scaffold(
29        appBar: AppBar(
30          title: Text("出席登録"),
31        ),
32        body: Center(
33          child: Container(
34            height: deviceHeight * 0.5,
35            width: double.infinity,
36            child: Consumer<QRModel>(builder: (context, model, child) {
37              return Stack(children: [
38                Padding(
39                  padding: const EdgeInsets.only(top: 50.0),
40                  child: Column(
41                    children: [
42                      Row(
43                        mainAxisAlignment: MainAxisAlignment.center,
44                        children: [
45                          Container(
46                            height: deviceHeight * 0.25,
47                            width: deviceWidth * 0.75,
48                            child: Column(children: [
49                              // FireStore保存用InvisibletextField
50                              Visibility(
51                                visible: false,
52                                child: TextField(
53                                  enabled: false,
54                                  controller: model.uidController,
55                                  onChanged: (text) {
56                                    model.setUid(uid!);
57                                  },
58                                ),
59                              ),
60                              Visibility(
61                                visible: false,
62                                child: TextField(
63                                  enabled: false,
64                                  controller: model.nameController,
65                                  onChanged: (text) {
66                                    model.setName(name!);
67                                  },
68                                ),
69                              ),
70
71                              Visibility(
72                                visible: false,
73                                child: TextField(
74                                  enabled: false,
75                                  controller: model.attendanceController,
76                                  onChanged: (text) {
77                                    model.setAttendance(attendance!);
78                                  },
79                                ),
80                              ),
81                            ]),
82                          ),
83                        ],
84                      ),
85                      Text("上記内容で出席しますか？"),
86                      ElevatedButton(
87                        onPressed: () async {
88                          model.startLoading();
89
90                          // 追加の処理
91                          try {
92                            await model.signUp();
93                            Navigator.of(context).pop();
94                          } catch (e) {
95                            final snackBar = SnackBar(
96                              backgroundColor: Colors.red,
97                              content: Text(e.toString()),
98                            );
99                            ScaffoldMessenger.of(context)
100                                .showSnackBar(snackBar);
101                          } finally {
102                            model.endLoading();
103                          }
104                        },
105                        child: Text('出席する'),
106                      ),
107                    ],
108                  ),
109                ),
110              ]);
111            }),
112          ),
113        ),
114      ),
115    );
116    // throw UnimplementedError();
117  }
118}
119

行動規範の内容に同意します

回答1件

自己解決

Dart
1import 'package:cloud_firestore/cloud_firestore.dart';
2import 'package:firebase_auth/firebase_auth.dart';
3import 'package:flutter/material.dart';
4
5class QRModel extends ChangeNotifier {
6  String? uid;
7  String? name;
8  String? attendance;
9  
10
11  bool isLoading = false;
12
13  void startLoading() {
14    isLoading = true;
15    notifyListeners();
16  }
17
18  void endLoading() {
19    isLoading = false;
20    notifyListeners();
21  }
22
23  void setUid(String uid) {
24    this.uid = uid;
25    notifyListeners();
26  }
27
28  void setName(String name) {
29    this.name = name;
30    notifyListeners();
31  }
32
33  void setAttendance(String attendance) {
34    this.attendance = attendance;
35    notifyListeners();
36  }
37
38  Future signUp() async {
39    var user = FirebaseAuth.instance.currentUser;
40
41    if (user != null) {
42      final doc = FirebaseFirestore.instance.collection('attendances').doc(uid);
43      await doc.set({
44        'uid': uid,
45        'createdAt': Timestamp.now(),
46        'name': name,
47        'attendance': attendance,
48      });
49    }
50  }
51}
52

Dart
1onPressed: () async {
2                          model.startLoading();
3                          model.setName(name!);
4                          model.setUid(uid!);
5                          model.setAttendance(attendance!);
6
7                          // 追加の処理
8                          try {
9                            await model.signUp();
10                            Navigator.of(context).pop();
11                          } catch (e) {
12                            final snackBar = SnackBar(
13                              backgroundColor: Colors.red,
14                              content: Text(e.toString()),
15                            );
16                            ScaffoldMessenger.of(context)
17                                .showSnackBar(snackBar);
18                          } finally {
19                            model.endLoading();
20                          }
21                        },