如何解决Flutter：解决了执行updateData时发生的错误，NOT_FOUND：没有要更新的文档
尝试更新Firebase数据库中的userData时出现以下错误
E/flutter ( 4756): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(Error performing updateData,NOT_FOUND: No document to update: projects/(DBname)/databases/(default)/documents/userData/ckua6TCjc2Dx76W6efuV,null)
这是我的UserData模型类
class UserData {
// String userId;
String id;
String firstName;
String lastName;
String phoneNumber;
String role;
String streetAddress;
String city;
String state;
String postcode;
String country;
Timestamp createdAt;
Timestamp updatedAt;
UserData();
UserData.fromMap(Map<String,dynamic> data) {
id = data['id'];
// userId = data['user_id'];
firstName = data['first_name'];
lastName = data['last_name'];
phoneNumber = data['phone_number'];
role = data['role'];
streetAddress = data['street_address'];
city = data['city'];
postcode = data['postcode'];
state = data['state'];
country = data['country'];
createdAt = data['created_at'];
updatedAt = data['updated_at'];
}
Map<String,dynamic> toMap() {
return {
'id': id,// 'user_id': userId,'first_name': firstName,'last_name': lastName,'phone_number': phoneNumber,'role': role,'street_address': streetAddress,'city': city,'postcode': postcode,'state': state,'country': country,'created_at': createdAt,'updated_at': updatedAt,};
}
}
这是我的UserDataNotifier类
class UserDataNotifier with ChangeNotifier {
UserData _loggedInUserData;
Query userDataCollection = Firestore.instance.collection('userData');
UserData get loggedInUserData => _loggedInUserData;
set loggedInUserData(UserData userData) {
_loggedInUserData = userData;
notifyListeners();
}
getUserData(UserDataNotifier userDataNotifier) async {
await userDataCollection
.orderBy('created_at',descending: true)
.getDocuments();
notifyListeners();
}
Future updateUserData(UserData userData,bool isUpdating) async {
CollectionReference userDataRef =
await Firestore.instance.collection('userData');
if (isUpdating) {
userData.updatedAt = Timestamp.now();
await userDataRef.document(userData.id).updateData(userData.toMap());
print('updated userdata with id: ${userData.id}');
} else {
userData.createdAt = Timestamp.now();
DocumentReference documentReference =
await userDataRef.add(userData.toMap());
userData.id = documentReference.documentID;
print('created userdata successfully with id: ${userData.id}');
await documentReference.setData(userData.toMap(),merge: true);
}
notifyListeners();
}
}
这是我的编辑个人资料屏幕，可以调用我的userNotifier
class ProfileFormScreen extends StatefulWidget {
static const String id = 'profile_form';
@override
_ProfileFormScreenState createState() => _ProfileFormScreenState();
}
class _ProfileFormScreenState extends State<ProfileFormScreen> {
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
UserData _userData;
//global declarations
String selectedBusinessTypeDropDownValue = 'Fashion';
String selectedCurrencyDropDownValue = 'NGN: Nigerian Naira';
String selectedCountryDropDownValue = 'Nigeria';
String email;
_saveUserData(BuildContext context) {
UserDataNotifier userNotifier =
Provider.of<UserDataNotifier>(context,listen: false);
if (!_formKey.currentState.validate()) {
return;
}
_formKey.currentState.save();
userNotifier.updateUserData(_userData,true);
Navigator.pop(context);
}
@override
void initState() {
super.initState();
UserDataNotifier userDataNotifier =
Provider.of<UserDataNotifier>(context,listen: false);
if (userDataNotifier.loggedInUserData != null) {
_userData = userDataNotifier.loggedInUserData;
} else {
_userData = UserData();
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Edit Profile'),),body: SingleChildScrollView(
padding: EdgeInsets.only(top: 20.0),child: Form(
autovalidate: true,key: _formKey,child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,crossAxisAlignment: CrossAxisAlignment.start,children: <Widget>[
LabelTextPadding(text: 'Business Information'),//business name
RegularTextPadding(regText: 'Business Name'),_buildBusinessName(),//business type
RegularTextPadding(regText: 'Business Type'),_buildBusinessType(),//Trading currency
RegularTextPadding(regText: 'Trading Currency'),_buildTradingCurrency(),//business location
RegularTextPadding(regText: 'Location'),//address 1
_buildAddress(),//city
_buildCityField(),//postcode
_buildPostcode(),//state
_buildStateField(),//country
_buildCountry(),SizedBox(
height: 20.0,DividerClass(),//Personal information
LabelTextPadding(
text: 'Personal Information',_buildFirstNameField(),_buildLastNameField(),_buildPhoneNumberField(),// _buildEmailField(),_buildButtons(),],);
}
_buildBusinessName() {
if (_userData.businessName == null) {
return PaddedInputTextFormField(
hintText: 'update business name',onSaved: (value) {
_userData.businessName = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.businessName,);
}
}
_buildBusinessType() {
return Padding(
padding: const EdgeInsets.all(20.0),child: DropdownButton(
value: _userData.businessType == null
? selectedBusinessTypeDropDownValue
: _userData.businessType,icon: Icon(FontAwesomeIcons.caretDown),elevation: 15,underline: Container(
height: 2,color: kThemeStyleButtonFillColour,items: businessType
.map(
(businessType) => DropdownMenuItem(
value: businessType,child: Text(businessType)),)
.toList(),onChanged: (newValue) {
setState(() {
selectedBusinessTypeDropDownValue = newValue;
_userData.businessType = newValue;
});
},);
}
_buildTradingCurrency() {
return Padding(
padding: const EdgeInsets.all(20.0),child: DropdownButton(
value: _userData.tradingCurrency == null
? selectedCurrencyDropDownValue
: _userData.tradingCurrency,items: tradingCurrency
.map(
(tradingCurrency) => DropdownMenuItem(
value: tradingCurrency,child: Text(tradingCurrency)),onChanged: (newValue) {
setState(() {
selectedCurrencyDropDownValue = newValue;
_userData.tradingCurrency = newValue;
});
},);
}
_buildAddress() {
if (_userData.streetAddress == null) {
return PaddedInputTextFormField(
hintText: 'address 1',onSaved: (value) {
_userData.streetAddress = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.streetAddress,);
}
}
_buildCityField() {
if (_userData.city == null) {
return PaddedInputTextFormField(
hintText: 'update city',onSaved: (value) {
_userData.city = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.city,);
}
}
_buildPostcode() {
if (_userData.postcode == null) {
return PaddedInputTextFormField(
hintText: 'update postcode',onSaved: (value) {
_userData.postcode = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.postcode,);
}
}
_buildStateField() {
if (_userData.state == null) {
return PaddedInputTextFormField(
hintText: 'update state',onSaved: (value) {
_userData.state = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.state,);
}
}
_buildCountry() {
return Padding(
padding: const EdgeInsets.all(20.0),child: DropdownButton(
value: _userData.country == null
? selectedCountryDropDownValue
: _userData.country,items: country
.map(
(country) =>
DropdownMenuItem(value: country,child: Text(country)),onChanged: (newValue) {
setState(() {
selectedCountryDropDownValue = newValue;
_userData.country = newValue;
});
},);
}
//user personal info build
_buildFirstNameField() {
if (_userData.firstName == null) {
return PaddedInputTextFormField(
hintText: 'update first name',onSaved: (value) {
_userData.firstName = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.firstName,);
}
}
_buildLastNameField() {
if (_userData.lastName == null) {
return PaddedInputTextFormField(
hintText: 'update last name',onSaved: (value) {
_userData.lastName = value;
},);
} else {
return PaddedInputTextFormField(
inputValue: _userData.lastName,);
}
}
_buildPhoneNumberField() {
if (_userData.phoneNumber == null) {
return PaddedInputTextFormField(
hintText: 'update phone number',onSaved: (value) {
_userData.phoneNumber = value;
},);
}
}
//build email form field
_buildEmailField() {
FutureBuilder<String>(
future: AuthProvider.of(context).auth.getCurrentUserEmail(),// ignore: missing_return
builder: (BuildContext context,AsyncSnapshot<String> snapshot) {
return PaddedEmailInputTextField(
emailInput: snapshot.data,onSaved: (value) => email = value,);
},);
}
_buildButtons() {
return Padding(
padding: const EdgeInsets.fromLTRB(15.0,10.0,15.0,10.0),child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,children: <Widget>[
Buttons(
onPressedButton: () {
Navigator.pop(context);
},buttonLabel: 'Cancel',buttonColour: kThemeStyleButtonFillColour,buttonTextStyle: kThemeStyleButton),SizedBox(
width: 15.0,Buttons(
onPressedButton: () => _saveUserData(context),buttonLabel: 'Save',);
}
}
我可能会丢失什么？我不确定如何解决我收到的错误。还看到其他在线开发人员也遇到了类似的问题，但是没有答案/线索很奏效。
谢谢。
解决方法
所以我弄清楚了为什么会出现该错误。问题是我在updateUserData（）方法中将isUpating设置为true，默认情况下，当在我的应用程序中没有初始数据保存到数据库时，该值为true。
没有现有数据时，我必须使用
documentReference.setData(userData.toMap())
因为目前没有要更新的内容
我希望这对寻求解决方案的人有所帮助。
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