Firestore-Flutter-GetX：如何获取文档 ID 以更新 Firestore 中的记录

Question

我对 Dart 很陌生，而且一般来说是编码。我在观看 YouTube 上的教程后制作了这段代码。大多数情况下，我已经能够自己解决大部分问题，但我无法找出最近的错误。我在 firestorm 中成功创建了记录，但我无法更新它，因为我无法获取文档 ID。

这是我的代码：-

import 'package:flutter/material.dart';
    import 'package:lms_definer/controllers/profileController.dart';
    import 'package:lms_definer/controllers/textController.dart';
    import 'package:get/get.dart';
    import 'package:lms_definer/model/profileModel.dart';
    import 'package:lms_definer/constants/constants.dart';
    import 'package:cloud_firestore/cloud_firestore.dart';
    import '../helper/firestore_db.dart';
    
    
    class EditProfile extends StatelessWidget {
      const EditProfile({Key? key}) : super(key: key);
    
      @override
      Widget build(BuildContext context) {
        var _textController = ProfileEdit();
    
        return Scaffold(
            body: GetX<ProfileController>(
              init: Get.put<ProfileController>(ProfileController()),
              builder: (ProfileController profileController) {
                return Container(
                  child: ListView.builder(
                      itemCount: profileController.profiles.length,
                      itemBuilder: (BuildContext context, int i) {
                        final _profileModel = profileController.profiles[i];
                        setTextEditControllerValue(_textController, _profileModel);
    
                        return SafeArea(
                          child: Container(
                            padding: EdgeInsets.all(20),
                            child: Form(
                              child: Column(
                                children: [
                                  TextFormField(
                                      decoration: const InputDecoration(
                                        labelText: 'First Name',
                                        border: OutlineInputBorder(
                                            borderSide: BorderSide()),
                                      ),
                                      controller: _textController.fNameController
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  TextFormField(
                                    decoration: const InputDecoration(
                                      labelText: 'First Name',
                                      border: OutlineInputBorder(
                                          borderSide: BorderSide()),
                                    ),
                                    controller: _textController.lNameController,
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  TextFormField(
                                    decoration: const InputDecoration(
                                      labelText: 'Address',
                                      border: OutlineInputBorder(
                                          borderSide: BorderSide()),
                                    ),
                                    controller: _textController.adressController,
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  TextFormField(
                                    decoration: const InputDecoration(
                                      labelText: 'Phone Numbaer',
                                      border: OutlineInputBorder(
                                          borderSide: BorderSide()),
                                    ),
                                    controller: _textController.phoneController,
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  TextFormField(
                                    decoration: const InputDecoration(
                                      labelText: 'School Name',
                                      border: OutlineInputBorder(
                                          borderSide: BorderSide()),
                                    ),
                                    controller: _textController.sclNameController,
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  TextFormField(
                                    decoration: const InputDecoration(
                                      labelText: 'Student Class',
                                      border: OutlineInputBorder(
                                          borderSide: BorderSide()),
                                    ),
                                    controller: _textController.stdClassController,
                                  ),
                                  SizedBox(
                                    height: 10,
                                  ),
                                  ElevatedButton(onPressed: () async {
                                    ProfileModel profileModel = profileModelVal(_textController);
                                    //await FirestoreDb.updateProfile(profileModel, documentId);
                                  }, child: Text('Update'))
                                ],
                              ),
                            ),
                          ),
                        );
                      }),
                );
              },
            ));
      }
    
      ProfileModel profileModelVal(ProfileEdit _textController) {
        final profileModel = ProfileModel(
            firstName:
            _textController.fNameController.text.trim(),
            lastName:
            _textController.lNameController.text.trim(),
            parentName: _textController
                .fatherNameController.text
                .trim(),
            phoneNumber:
            _textController.phoneController.text.trim(),
            address:
            _textController.adressController.text.trim(),
            schoolName:
            _textController.sclNameController.text.trim(),
            stdClass: _textController.stdClassController.text
                .trim());
        return profileModel;
      }
    
      void setTextEditControllerValue(ProfileEdit _textController,
          ProfileModel _profileModel) {
        _textController.fNameController.value =
            TextEditingValue(text: _profileModel.firstName);
        _textController.lNameController.value =
            TextEditingValue(text: _profileModel.lastName);
        _textController.fatherNameController.value =
            TextEditingValue(text: _profileModel.parentName);
        _textController.adressController.value =
            TextEditingValue(text: _profileModel.address);
        _textController.phoneController.value =
            TextEditingValue(text: _profileModel.phoneNumber);
        _textController.sclNameController.value =
            TextEditingValue(text: _profileModel.schoolName);
        _textController.stdClassController.value =
            TextEditingValue(text: _profileModel.stdClass);
      }
    
      void clearTextController(ProfileEdit _textController) {
        _textController.fNameController.clear();
        _textController.lNameController.clear();
        _textController.fatherNameController.clear();
        _textController.adressController.clear();
        _textController.phoneController.clear();
        _textController.sclNameController.clear();
        _textController.stdClassController.clear();
    
      }
    }

我的数据库文件：-

        import 'package:cloud_firestore/cloud_firestore.dart';
    import 'package:flutter/cupertino.dart';
    import 'package:lms_definer/constants/constants.dart';
    import 'package:lms_definer/model/profileModel.dart';
    
    class FirestoreDb {
      static createProfile(ProfileModel profilemodel) async {
        await firebaseFirestore.collection('users').doc(auth.currentUser!.uid)
            .collection('profile')
            .add({
          'firstName': profilemodel.firstName,
          'lastName': profilemodel.lastName,
          'parentName': profilemodel.parentName,
          'phoneNumber': profilemodel.phoneNumber,
          'address': profilemodel.address,
          'schoolName': profilemodel.schoolName,
          'stdClass': profilemodel.stdClass,
          'createdOn': Timestamp.now(),
          'isDone': true
        });
      }
    
      static Stream<List<ProfileModel>> profileStream() {
        return firebaseFirestore
            .collection('users')
            .doc(auth.currentUser!.uid)
            .collection('profile')
            .snapshots()
            .map((QuerySnapshot query) {
          List<ProfileModel> profiles = [];
          for (var profile in query.docs) {
            final profileModel =
            ProfileModel.fromDocmentSnapshot(documentSnapshot: profile);
            profiles.add(profileModel);
          }
          return profiles;
        });
      }
    
    
      static updateProfile(ProfileModel profilemodel, documentId ) {
        firebaseFirestore
            .collection('users')
            .doc(auth.currentUser!.uid)
            .collection('profile')
            .doc(documentId)
            .update(
            {
              'firstName': profilemodel.firstName,
              'lastName': profilemodel.lastName,
              'parentName': profilemodel.parentName,
              'phoneNumber': profilemodel.phoneNumber,
              'address': profilemodel.address,
              'schoolName': profilemodel.schoolName,
              'stdClass': profilemodel.stdClass,
              'createdOn': Timestamp.now(),
    
            }
        );
      }
    
      static deleteProfile(String documentID) {
        firebaseFirestore.collection('users').doc(auth.currentUser!.uid).collection(
            'profile').doc(documentID).delete();
    
    }}

我需要文档 ID 来更新文件。请帮忙。谢谢

Answer 1

一旦用户登录（我假设 EditProfile 页面仅对登录用户可见），您应该将 userId 存储在某处。这可以使用 flutter_secure_storage or using an auth library like FirebaseAuth.

来完成

然后当你想更新用户的文档时，你可以获取之前存储的userId来更新文档。

Answer 2

static updateProfile(ProfileModel profilemodel, documentId ) {
        firebaseFirestore
            .collection('users')
            .doc(auth.currentUser!.uid)
            .collection('profile')
            .get()
            .then((QuerySnapshot querySnapshot) {
              final docId = queryShapchot.docs.first.id;
   
              firebaseFirestore
                .collection('users')
                .doc(auth.currentUser!.uid)
                .collection('profile')
                .doc(docId)
                .update({
                   // Add data here
                })
            });
      }

这应该可以解决您的问题。

Firestore-Flutter-GetX：如何获取文档 ID 以更新 Firestore 中的记录

Firestore-Flutter-GetX: How to get document id to update a record in Firestore

database

firebase

flutter

google-cloud-firestore

flutter-getx