patch(return types): union return type with undefined.

React query data is undefined by default.
Previously we were overriding the default type of react query.
Now union with undefined.
We are also exporting the data type.

Author: seriouslag

examples/react-app/petstore.yaml

@@ -77,6 +77,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error'
+  /not-defined:
+    get:
+      description: This path is not fully defined.
+      responses:
+        default:
+          description: unexpected error
   /pets/{id}:
     get:
       description: Returns a user based on a single ID, if the user does not have access to the pet

examples/react-app/src/App.tsx

@@ -3,6 +3,7 @@ import {
   useDefaultClientAddPet,
   useDefaultClientFindPets,
   useDefaultClientFindPetsKey,
+  useDefaultClientGetNotDefined,
 } from "../openapi/queries";
 import { useState } from "react";
 import { queryClient } from "./queryClient";
@@ -13,6 +14,10 @@ function App() {
 
   const { data, error, refetch } = useDefaultClientFindPets({ tags, limit });
 
+  // This is an example of a query that is not defined in the OpenAPI spec
+  // this defaults to any - here we are showing how to override the type
+  const { data: notDefined } = useDefaultClientGetNotDefined<undefined>();
+
   const { mutate: addPet } = useDefaultClientAddPet();
 
   if (error)