[Discussion] Parsing input that's a superset of the schema type

Given a zod schema like

const ZRecord = z.object({
    id: z.number(),
    name: z.string()
});

how can I use ZRecord to extract the schema from a conforming object that has additional fields? E.g.

const result = ZRecord.safeParse({ id: 123, name: "Joe", notes:"enjoys hiking" });

Is there any option that I can pass to the parse methods (e.g. ZRecord.safeParse) that will ignore additional keys, but also mention them in the result.error.errors list? I was hoping that even when result.success was false, result.data would still have the parsed hierarchy. I don’t see a way to do this other than iterating through the ZAddEntryParams.shape hierarchy and pulling the relevant attributes from the input into a new “clipped” object before parsing.

It would be valuable to extract the schema from a larger object for something like a web request, to give the API caller a message that they had extra keys in their request.

[pjdon]

Oh I see, that was just a secondary thing and .passthrough covers my use case pretty well. I kinda merged the two questions into one and it wasn’t clear. The reply with the link was for posterity.

Thanks for making this library. The more I use it the more I’m impressed with how complete and well conceived it is!

[colinhacks]

Thank you! That’s always great to hear 😃