问题
I'm facing the same problem as this guy question
But his accepted answer didn't helped me.
The problem:
When an user signs out, and another different user signs in, all data shown on my app is from the previous signed out user due to firebase caching system. I searched about this issue and found a solution that consists in calling this method:
FirebaseFirestore.instance.clearPersistence();
But everytime and everywhere I place this line of code, throws an exception saying I cannot call this method when the client is running:
Exception has occurred. PlatformException (PlatformException(failed-precondition, Operation was rejected because the system is not in a state required for the operation's execution. If performing a query, ensure it has been indexed via the Firebase console., {code: failed-precondition, message: Operation was rejected because the system is not in a state required for the operation's execution. If performing a query, ensure it has been indexed via the Firebase console., nativeErrorMessage: Persistence cannot be cleared while the client is running., nativeErrorCode: 9}))
so, how to call this method? or better, is there a best way to solve this problem?
回答1:
You should call it immediately after you initialize Firebase, and before you make the first query.
回答2:
It seems it's necessary to terminate the FirebaseFirestore.instance first.
At the end of my log off method I call:
await FirebaseFirestore.instance.terminate();
await FirebaseFirestore.instance.clearPersistance();
I get no errors thrown and everything seems to be working as it should now.
来源：https://stackoverflow.com/questions/63930954/how-to-properly-call-firebasefirestore-instance-clearpersistence-in-flutter