All return types from schema are <type> | undefined

[dino-rodriguez]

All of the return types from my schema are the return type | undefined.

In my open API compliant API, the return types of the functions are not optional, they are required. How can I make this all return the required types instead of optional types in open API fetch?

e.g. the output type of data of a call like this:

const { data } = await post('/v1/example_endpoint', {
    body: {}
  });

is

{ message: string } | undefined

[drwpow]

It’s | undefined because you haven’t checked for the existence of error yet. Once you’ve handled error, then data will always be defined. This is to make sure your error messages are shown to the user / handled properly!