如何解决"Unhandled Exception: PlatformException(Error performing updateData, NOT_FOUND: No document to update:"

Question

我的编辑class.

import 'package:finalyearproject/model/NewUser.dart';
import 'package:finalyearproject/service/database.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:uuid/uuid.dart';




class UpdateSupervisor extends StatefulWidget {

  final NewUser sv;

  UpdateSupervisor({Key key, this.sv}) : super(key: key);

  @override
  _UpdateSupervisorState createState() => _UpdateSupervisorState();
}


class _UpdateSupervisorState extends State<UpdateSupervisor> {
  final GlobalKey<FormState> _formKey = GlobalKey();
  TextEditingController _name;
  TextEditingController _email;
  TextEditingController _nophone;
  TextEditingController _uniqueID;


  var uuid = Uuid();

@override
void initState(){
     super.initState();
     _name = TextEditingController(text:  widget.sv.name);
     _email = TextEditingController(text:  widget.sv.email);
     _nophone = TextEditingController(text: widget.sv.nophone);
     _uniqueID= TextEditingController(text: widget.sv.uniqueID);
  }
    @override
    Widget build(BuildContext context) {
      return Scaffold(
          appBar: AppBar(
            title: Text('Edit Supervisor'),
            backgroundColor: Colors.redAccent,
          ),
          body: Form(
            key: _formKey,
            child: SingleChildScrollView(
              padding: const EdgeInsets.all(16.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.end,
                children: <Widget>[
                  SizedBox(height: 25.0),
                  TextFormField(
                    decoration: InputDecoration(
                        hintText: 'Name',
                        border: OutlineInputBorder(
                            borderRadius: BorderRadius.circular(5))),
                    keyboardType: TextInputType.text,
                    controller: _name,
                  ),
                  SizedBox(height: 10.0),
                  TextFormField(
                    decoration: InputDecoration(
                        hintText: 'Email',
                        border: OutlineInputBorder(
                            borderRadius: BorderRadius.circular(5))),
                    keyboardType: TextInputType.emailAddress,
                    controller: _email,

                  ),
                  SizedBox(height: 10.0),
                  TextFormField(
                    decoration: InputDecoration(
                        hintText: 'Number Phone',
                        border: OutlineInputBorder(
                            borderRadius: BorderRadius.circular(5))),
                    keyboardType: TextInputType.number,
                    controller: _nophone,

                  ),
                  SizedBox(height: 10.0),
                  TextFormField(
                    decoration: InputDecoration(
                        hintText: 'Unique ID ',
                        border: OutlineInputBorder(
                            borderRadius: BorderRadius.circular(5))),
                    keyboardType: TextInputType.number,
                    controller: _uniqueID,
                  ),
                  const SizedBox(height: 20.0),
                  RaisedButton(
                      color: Colors.redAccent,
                      textColor: Colors.black,
                      child: Text( "Update"),
                      onPressed: () async {
                        if (_formKey.currentState.validate()) {
                          DatabaseService().updateData(NewUser(name: _name.text, email: _email.text, nophone: _nophone.text, uniqueID: _uniqueID.text, id: uuid.v4()));
                        }
                      }
                  ),
                ],
              ),
            ),
          )
      );
    }
  }

我的功能更新

 // update data supervisor
    Future updateData(NewUser newUser) async {
     
        return supervisorCollection.document(newUser.id).updateData(
            newUser.toJson()).whenComplete(() {
          print("Update success!");
        });
    }

这是我的控制台 firebase

supervisor collection

这是我的错误

未处理的异常：PlatformException（执行更新数据时出错，NOT_FOUND：没有要更新的文档：projects/finalyearproject-5c689/databases/（默认）/documents/Supervisor/3dbac00b-29ad-4357-a480-e38a21c90042，空）

我曾尝试使用 setData() 作为我的更新函数，但它会添加新数据，而不是更新现有数据。所以有人可以帮我解决这个问题吗？有什么我遗漏的吗？

Answer 1

uuid.v4() 将生成一个 v4（随机）ID，而您正在尝试使用您的集合中不存在的这个随机生成的新 ID 更新文档。

修复它：

var id = widget.sv.id;

在您的新用户中使用此 ID 发送至更新功能：

DatabaseService().updateData(NewUser(name: _name.text, email: _email.text, nophone: _nophone.text, uniqueID: _uniqueID.text, id: id));

如何解决"Unhandled Exception: PlatformException(Error performing updateData, NOT_FOUND: No document to update:"

How to solve "Unhandled Exception: PlatformException(Error performing updateData, NOT_FOUND: No document to update:"

firebase

flutter

updates