Zod type ZodNonEmptyArray is unsupported by OpenAPI

If output uses z.array().notempty, Open API won’t start with the message Zod type ZodNonEmptyArray is unsupported ZodUndefined also does not work express-zod-api version is 2.3.0

[kirdk]

@kirdk , please upgrade to version 2.3.2 I’ve just released and make sure that your package manager installs Zod version 3.7.2 as the dependency. I believe this should fix your issue with ZodNonEmptyArray.

Use if ('field' in object) type narrowing syntax instead of ZodUndefined. I believe this should fix your issue with ZodUnion.

I’m closing this issue. In case your issue persist please open another one with detailed code samples. Thank you for your feedback.

@RobinTail, using ‘in’ is not an elegant solution, because the whole code should be wrapped just because we using one union with an optional field. We already wrapping the access to the field value, because it can be undefined. Additional wrapping just to get it works with Openapi it’s not awesome 😃 Thanks anyway! We will try to reopen the issue after the project deadline and prepare a sample.

[kirdk]

@kirdk , Regarding ZodNonEmptyArray issue.

I figured out that there is no such class in Zod 3.7.x, though it existed in 3.6.x. But express-zod-api is using 3.7.1 since version 2.1.0.

The fact that you are experiencing this issue with the latest version of express-zod-api might mean that for some reason you have incorrect version of Zod installed as the express-zod-api dependency.

Please check out this PR with a test that covers the z.array().nonempty() case, additional information and recommendations:

#105

Dear @RobinTail , while we prepared a project to reproduce the issue you solved it). I do confirm that problem was in zod dependency. After the update, the issue is solved.