Unable to generate OpenAPI schema while using z.preprocess() #1317
Description
Environment
@orpc/openapi: 0.0.0-next.c20c3b4
zod: ^4.1.12
Reproduction
https://stackblitz.com/edit/github-7egr8s3b-2pxykj31
Describe the bug
Unable to generate an OpenAPI schema while using z.preprocess(). This is necessary since we're preprocessing user input before validating it against a enum type.
Key reproducible:
const SchemaWithPreprocess = z.preprocess((val) => {
if (typeof val === 'string') {
return val.toUpperCase();
}
return val;
}, z.string());
oc.input(
z.object({
params: z.object({
type: SchemaWithPreprocess,
}),
})
)Additional context
No response
Logs
OpenAPIGeneratorError: Some error occurred during OpenAPI generation:
[OpenAPIGenerator] Error occurred while generating OpenAPI for procedure at path: test
When input structure is "detailed" and path has dynamic params, the "params" schema must be an object with all dynamic params as required.
at new OpenAPIGeneratorError (file:///home/projects/github-7egr8s3b-2pxykj31/node_modules/@orpc/openapi/dist/shared/openapi.CoREqFh3.mjs:517:1)
at OpenAPIGenerator.generate (file:///home/projects/github-7egr8s3b-2pxykj31/node_modules/@orpc/openapi/dist/shared/openapi.CoREqFh3.mjs:587:13)
at async Server.eval (file:///home/projects/github-7egr8s3b-2pxykj31/src/main.ts:18:935)