useMutation type constraint error: paths missing index signature (Record<string, Record<HttpMethod, {}>>)

[gromchen]

openapi-react-query version

0.2.5

Description

I’m trying to create a custom helper function to call useMutation without manually retrieving the client from the context each time:

export const useMutation: UseMutationMethod<paths, `${string}/${string}`> = (...args) => {
  const { client } = useClientContext();

  return client.useMutation(...args);
};

However, TypeScript throws the following error:

Type 'paths' does not satisfy the constraint 'Record<string, Record<HttpMethod, {}>>'.
  Index signature for type 'string' is missing in type 'paths'.ts(2344)

Reproduction

I have a client stored inside a React Context because I need access to the auth.js session to provide access tokens in the fetch middleware. The entire application is already wrapped in the client provider. I’m trying to avoid manually calling useClientContext() everywhere — I want a simple, local useMutation hook.

Expected result

One should be able to use the paths type with UseMutationMethod.

Extra

• I’m willing to open a PR (see CONTRIBUTING.md)