The option to define custom string formats

[LufyCZ]

Hey, I've come across a (mostly) edge-case that doesn't currently appear to be workaroundable.

We use custom string formats (0x${string}) in a couple of places in our app, and it'd be great if we could get fields typed end-to-end, otherwise it means having to check/cast everything on the client. I have already figured out how to get openapi-generator to output a custom type if a custom format is used, but express-zod-api only adds the format field for a preselected set of formats

I am not sure what the right way to implement this would be, but I'd really appreciate if this got added 😄

[RobinTail]

Hello @LufyCZ

1. You can do z.string().regex(/^0x.+$/) and the Open API depiction would be:

type: string
pattern: ^0x.+$

2. You can use Custom brands approach for taking a full control on depiction.

I hope it helps. Let me know what you think.

[LufyCZ]

Perfect! Thank you. I think I just didn't understand the point of brands before, now it all makes sense 😄