Flutter：firebase_auth 好像不行，怎么授权？

Question

I have a working flutter app which uses the cloud_firestore package, it's going well with Android and iOS.But my database is "allow read,write: if true", and so Google keeps reminding me to fix this unsecurity. This I did:

• including firebase_auth
• changing my rules on firebase
• creating a mail/password account
• implementing the login procedure
• changing the rules to "allow write: if request.auth;= null;"

I think I made everything ok. In the app, it seems so:

print("User ${(await FirebaseAuth.instance.currentUser()).email})");

This gives me the mail of my account. Also I have a onAuthStageChanged listener and I get what I would expect. So I guess the login did work.

But if I try to make a database access eg with.setData(), I get an error

W/Firestore( 4411): (19.0.0) [Firestore]: Write failed at...: Status{code=PERMISSION_DENIED, description=Missing or insufficient permissions., cause=null}

It looked for me as if the auth package is not informing the firestore package correctly. In the logs, I see

D/FirebaseAuth( 5698): Notifying id token listeners about user (...).

I would expect something like "Firestore: received token...", but this does not come.

Do I have to be careful with the initialization order? Mine is

1. _app = await Firebase.App.configure...
2. _firestore = Firestore(app: _app);
3. await FirebaseAuth.instance.signInWithEmailAndPassword...

I tried it on some Samsung and OnePlus devices with Android 8 and 9.

Any hints someone?

Answer 1

I got it running!! Used a hint from Flutter & Firebase - using firebase_storage along with firebase_auth

When accessing the database, I used a pointer to the firestore which I created like

static Firestore _firestore;
...
_firestore = Firestore(app: ...);

And later I used

await _firestore.collection(...)...setData(...);

But the Firestore seems to change after a login. It works when I write:

await Firestore.instance.collection...setData

Interesting!!