Manually set cookie in graphql resolver

[Ma-Kas]

Built a custom login endpoint. For this endpoint I have graphql resolver that uses the localApi to login a user. However, I now need to set the cookie in the response. According to the documentation, res is available through the context and could even be passed to payload.login to automatically set the cookie.

Unfortunately, res does not seem to exist on context, and I have not found a way to get access to it. All ways and accepted answers seem to no longer be working in the current version.

References:
#9829
https://payloadcms.com/docs/graphql/extending#resolver-function

payload-version: 3.17.1
Next.js version: 15.1.1

[Ma-Kas]

It seems the default payload.login function sets cookies via context.headers['Set-Cookie'], but this is not passed through to the custom resolver.

So to solve this, I had to set them again within the custom resolver like so:

if (loginResult.token) {
    const cookie = generatePayloadCookie({
      collectionAuthConfig: userCollection.config.auth,
      cookiePrefix: context.req.payload.config.cookiePrefix,
      token: loginResult.token,
    });

    context.headers['Set-Cookie'] = cookie;

    if (userCollection.config.auth.removeTokenFromResponses) {
      delete loginResult.token;
    }
  }