Type errors when compiling with the --axios option

[Isaac-Leonard]

I get these errors when running tsc after generating the api with the axios option.
The normal fetch option works fine however I am targeting node and node-fetch doesn't want to work with it.
The compilation errors I get are:
src/api/data-portal.ts:471:7 - error TS2532: Object is possibly 'undefined'.

471 requestParams.headers.common = { Accept: "/" };
~~~~~~~~~~~~~~~~~~~~~

src/api/data-portal.ts:471:7 - error TS2322: Type '{ Accept: string; }' is not assignable to type 's
tring'.

471 requestParams.headers.common = { Accept: "/" };
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/api/data-portal.ts:472:7 - error TS2532: Object is possibly 'undefined'.

472 requestParams.headers.post = {};
~~~~~~~~~~~~~~~~~~~~~

src/api/data-portal.ts:472:7 - error TS2322: Type '{}' is not assignable to type 'string'.

472 requestParams.headers.post = {};
~~~~~~~~~~~~~~~~~~~~~~~~~~

src/api/data-portal.ts:473:7 - error TS2532: Object is possibly 'undefined'.

473 requestParams.headers.put = {};
~~~~~~~~~~~~~~~~~~~~~

src/api/data-portal.ts:473:7 - error TS2322: Type '{}' is not assignable to type 'string'.

473 requestParams.headers.put = {};
~~~~~~~~~~~~~~~~~~~~~~~~~

Found 6 errors.
I generate the api successfully with the command:
npx swagger-typescript-api --path src/un-data-portal.json -o ./src/api/ -n data-portal.ts --axios
And then run:
npx tsc
If there is no easy fix for this does anyone know how to get node-fetch working with the default version instead?
In case it matters I'm using the latest versions of axios and swagger-typescript-api and using node v16.8.0 with typescript Version 4.4.3 .

[Isaac-Leonard]

Heres the relevant lines in the outputted file starting from line 470:
if (type === ContentType.FormData && body && body !== null && typeof body === "object") {
requestParams.headers.common = { Accept: "/" };
requestParams.headers.post = {};
requestParams.headers.put = {};

  body = this.createFormData(body as Record<string, unknown>);
}

[kompasbank-niels]

I have the same issue and worked around it by adding // @ts-ignore before those 3 lines.

[Isaac-Leonard]

I've done that for now but its not really a sustainable option if I end up sticking with my current project.
I could look into making a pull request with a proper fix but atm I'm not sure what is meant to actually be happening there.

[tiagoskaneta]

TLDR: stick with axios@0.21.4 for now I guess.

There have been changes to typing in axios@0.22.0 and 0.23.0
https://github.com/axios/axios/pull/3021/files
https://github.com/axios/axios/pull/4140/files

This construction is no longer possible (not sure it had any effect in the first place TBH).

requestParams.headers.common = { Accept: "*/*" };
requestParams.headers.post = {};
requestParams.headers.put = {};

As the common, post and put are only available in the default headers, i.e. something like this:

this.instance.defaults.headers.common = { Accept: "*/*" };
this.instance.defaults.headers.post = {};
this.instance.defaults.headers.put = {};

Would this be desired effect or was the intention for the changes in the header to be applied only for the current request?

[grandsilence]

Use the swagger-typescript-api-nextgen fork, it solves this problem. The package is present in the npm.