Error: The dataProvider threw an error. It should return a rejected Promise instead.

[rachit-malvi]

As per the doc on https://github.com/marmelab/react-admin/blob/master/docs/DataProviders.md
"Error Format
When the API backend returns an error, the Data Provider should return a rejected Promise containing an Error object. This object should contain a status property with the HTTP response code (404, 500, etc.). React-admin inspects this error code, and uses it for authentication (in case of 401 or 403 errors). Besides, react-admin displays the error message on screen in a temporary notification."

The data provider isn't returning a rejected promise.
react-admin version 3.3.1
ra-data-feathers version 2.7.0

Refer the code below

[josx]

• Does feathers client return rejected promises on error?
• What is returning on error in your example?
• Can you make a test?

[rachit-malvi]

• On using getOne instead of getList and passing a non-existing userId, it returns Error.
• When I try to GET the users list on Postman, it gives the correct result.

[josx]

I cant understand if you call getOne with a non-existing userId, what value are you expecting back?