get untransformed value in z.coerce error function

[Alvi24]

i want to get the original value in z.coerce

z.coerce.number<number>({
  error: ()=>{
   // get the original value here
   })

[dosubot[bot]]

You can't access the original (untransformed) value inside the error function of z.coerce.number. Zod's coercion overwrites the input before validation, so the issue.input you get in the error callback is always the coerced value, not the raw input. This is intentional in Zod's design—there's no built-in way to get the original value once coercion happens (source).

If you need to distinguish between cases like an empty string and zero, the recommended workaround is to avoid z.coerce and use a string schema with a transform, then pipe to a number schema. This way, you can handle error messages based on the original input:

const schema = z.object({
  price: z
    .string()
    .transform(Number)
    .pipe(z.number().min(1).max(10000))
})

This pattern lets you inspect the original string before it's converted, so you can customize errors as needed (discussion).

Let me know if this solves your problem—if so, feel free to close the issue!

To reply, just mention @dosu.

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