Handling Firebase Insufficient Permissions Errors in Flutter

问题

How can I handle insufficient permissions errors from firebase? I currently do this:

      try {
        DocumentSnapshot doc = await Firestore.instance.collection('SomeCollection').document('SomeDocument').get();
        // Do something
      } catch (error) {
        print('Error: $error');
        // Do something to show user
      }

How ever I can't check for only Permission Errors. Sho how can I catch only insufficient permission errors?

Also when should I use .catchError(), I tried this:

        DocumentSnapshot doc = await Firestore.instance.collection('Some Collection').document('Some Document').get().catchError((onError) {
          // What to do here
        });

I doens't seem to really catch a error, because the exception is still thrown

回答1:

This is supposed to work

 DocumentSnapshot doc = await Firestore.instance.collection('Some Collection').document('Some Document').get().catch((err)=>print(err));

来源：https://stackoverflow.com/questions/55086984/handling-firebase-insufficient-permissions-errors-in-flutter