openapi-fetch: How to specify which content-type is returned in data?

[ViktorPontinen]

Hi,

Considering the follow types generated from openapi-typescript (removed unrelevant fields):

    someCollection: {
        responses: {
            200: {
                headers: {
                    [name: string]: unknown;
                };
                content: {
                    "application/json": components["schemas"]["Some-List"][];
                    "application/vnd.api+json": components["schemas"]["Some-List"][];
                    "application/hal+json": components["schemas"]["Some-List"][];
                    "application/ld+json": {
                        "hydra:member": components["schemas"]["Some-List"][];
                        "hydra:totalItems"?: number;
                        "hydra:view"?: {
                            /** Format: iri-reference */
                            "@id"?: string;
                            "@type"?: string;
                            /** Format: iri-reference */
                            "hydra:first"?: string;
                            /** Format: iri-reference */
                            "hydra:last"?: string;
                            /** Format: iri-reference */
                            "hydra:next"?: string;
                        };
                        "hydra:search"?: {
                            "@type"?: string;
                            "hydra:template"?: string;
                            "hydra:variableRepresentation"?: string;
                            "hydra:mapping"?: {
                                "@type"?: string;
                                variable?: string;
                                property?: string | null;
                                required?: boolean;
                            }[];
                        };
                    };
                    "text/html": components["schemas"]["Some-List"][];
                };
            };
        };
    };

And the follow implementation:

import createClient from 'openapi-fetch'
import type { paths } from './openapi.d.ts'

export const client = createClient<paths>({
  baseUrl: "...",
  headers: {
    'Content-Type': 'application/json',
  },
})

export const someFunction = async () => {
  const { data, error } = await client.GET('/api/some-endpoint', {})

  return data.map(item => item.name)
}

Then typescript does not seem to be able to resolve the proper "content" type in the data variable. It is typed as string when you try to access properties.
We generally want it to use the application/json by default, but in other cases use other types.
How do you resolve this?

[ViktorPontinen]

Update. Eventually figured out that you also can pass a second type arg to createClient. Like so:

export const client = createClient<paths, 'application/json'>({
  baseUrl: '...',
  headers: {
    'Content-Type': 'application/json',
  },
})

Now the second question is if there a way to change this per request basis or if I need to create separate clients for each response type?

[ViktorPontinen]

Found this one in draft: #1600
So I guess not possible at the moment. Might take a stab at it in the future.