Permission denied while configuring firestore in flutter - firebase

Question

I am trying to add security rules to my app have firebase firestore feature so the rules are
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
function isSignedIn() {
return request.auth.uid != null;
}
allow read, write: if isSignedIn() && request.auth.uid == resource.data.uid
}
}
}
and this is the function for getting query snapshot
Stream<QuerySnapshot> diarySnapshot(String uid){
return _firestore
.collection(uid)
.where('uid', isEqualTo:uid)
.snapshots();
}
but I am getting an error
[Firestore]: Write failed at 2nVrS92SbOZocu2CJY3Tj68er1n2/rXZAWPxEqhtqwmOrtZfo: Status{code=PERMISSION_DENIED, description=Missing or insufficient permissions., cause=null}
One more thing each user would have their own collection named on their id.
EDIT
** DatabaseService.dart**
class DatabaseService{
Firestore _firestore=Firestore.instance;
/*Future<void> configure() async{
final FirebaseApp app=await FirebaseApp.configure(name:'notes',
options: FirebaseOptions(
googleAppID: '1:1051484666895:android:7e879575351f8463b2f77a',
projectID: 'notes-e2864',
gcmSenderID:'1051484666895',
apiKey: 'AIzaSyBrCie0qxxwn0KwSLJ1wwTxnVZ7nLz-QkY'
),
);
_firestore = Firestore(app: app);
}
*/
Future setNewData(String uid,String title,String diary,DateTime dateTime) async{
await _firestore.collection(uid).document().setData({
'title':title,
'diary':diary,
'dateTime':dateTime.toString()
});
}
Stream<QuerySnapshot> diarySnapshot(String uid){
return _firestore
.collection(uid)
.where('uid', isEqualTo:uid)
.snapshots();
}
}
I tried both commented and uncommented code, the commented was being first configured and and then program was run.
ServiceViewModel
class ServiceViewModel extends ChangeNotifier {
final AuthService _authService=AuthService();
final DatabaseService _databaseService=DatabaseService();
String _uid;
/*ServiceViewModel(){
_databaseService.configure();
}*/
void signInWithEmailAndPassword(String email,String password) async {
await _authService.signInWithEmailAndPassword(email, password);
}
void registerInWithEmailAndPassword(String email,String password) async {
await _authService.registerWithEmailAndPassword(email, password);
}
void signInWithGoogle()async {
await _authService.signInWithGoogle();
print('Sign In With Google');
}
void signOut(){
_authService.signOut();
_uid=null;
}
/* void setUid() async{
_uid=await _authService.getCurrentUser();
}*/
void setData(String title, String diary, DateTime dateTime) async{
await _authService.getCurrentUser().then((value) async {
return await _databaseService.setNewData(value.toString(), title, diary, dateTime);
});
}
Stream<QuerySnapshot> getSnapShot(String uid) {
return _databaseService.diarySnapshot(uid);
}
}

Answer 1

resource.data does not exist on create, hence you error.
Try this instead:
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
function isSignedIn() {
return request.auth.uid != null;
}
allow create: if isSignedIn() && request.auth.uid == request.resource.data.uid;
allow update: if isSignedIn() && request.auth.uid == resource.data.uid
&& request.auth.uid == request.resource.data.uid;
allow read, delete: if isSignedIn() && request.auth.uid == resource.data.uid
}
}
}
EDIT: special case for update not to get stucked