Hi I have a problem with serialization enum using kotlin, spring, jackson. I made a stack overflow q...

# spring

[Václav Škorpil]

Hi I have a problem with serialization enum using kotlin, spring, jackson. I made a stack overflow question so i wont copy paste it, maybe someone of you will know how to solve it.
https://stackoverflow.com/questions/72700370/spring-boot-serialize-kotlin-enum-by-custom-property.

[Jukka Siivonen]

Probably not Kotlin related but I think RequestParam does not use Jackson but Spring converters instead. If you use RequestBody then Jackson is used

[Václav Škorpil]

Ohhh, that might be that case. And is it possible to use set it up to use jackson?

[Jukka Siivonen]

I don't think it would make any sense because request parameters and actual body are different things

[Jukka Siivonen]

So if you want this enum to work as a standalone req parameter and also inside body object you need Jackson configuration/annotation and custom Spring converter

[Václav Škorpil]

Also is there a Spring documentation that explains how it works in detail?

[pi0id]

For a regular conversion, Spring is able to initialize your param without any helping converter. In your case, a custom conversion is needed from name to NAME and from registrationNumber to REGISTRATION_NUMBER .
So, create a class annotated with @Component that implements Converter interface. You just have to implement the required method convert from source object to target.
Also, remove the @RequestParam annotation from the endpoint.