useGetManyAggregate throws "filter is not a function" when getting 401

[matthieuMay]

What you were expecting:
When getting a 401, useGetManyAggregate should not throw errors

What happened instead:
useGetManyAggregate throws "filter is not a function" when getting 401

Steps to reproduce:
Log to a react-admin application where you use useGetManyAggregate ; delete your auth cookie manually and see all the errors in the console

Related code:
This is due to useDataProvider that does not return the correct type of data on logout (l.112 of useDataProvider.ts)

Other information:
PR #8131

Environment

• React-admin version: 4.3.0

[WiXSL]

Thanks for reporting this. Please provide a sample application showing the issue by forking the following CodeSandbox (https://codesandbox.io/s/github/marmelab/react-admin/tree/master/examples/simple).

If you are sure this is a bug and you can produce a PR with its corresponding test as you say, that would be great!
Than you