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kotlinlang

Is it possible to have schema validation of path parameters in a contract? I have tried
```routes += "/foo" / Path.regex("[0-9a-fA-F]{64}").of("bar", "Hex encoded value") meta { /* ... */ }```
but I can't get it to match anything, and no corresponding schema is included in the generated OpenAPI JSON doc.

Ah, it seems like I need to wrap the regex with `()` .

Makes sense.  I was confused too.

An alternative is to use a <https://github.com/fork-handles/forkhandles/tree/trunk/values4k|values4k >class with regex validation.  <https://github.com/fork-handles/forkhandles/tree/trunk/values4k|Values4k >is a third-party lib, but http4k has built-in support for it. For example:

```class UserCode private constructor(value: String) : StringValue(value) {
    companion object : StringValueFactory&lt;UserCode&gt;(::UserCode, "\\d{6}".regex)
}```
and then make a lens with `Path.value(UserCode).of("user_code")`