Jakarta validation does not seem to do anything

Question

I use Kotlin and Spring. I can validate the values using normal 'if's and exceptions but at least in theory there is a validation method provided by the framework

According to the docs and posts on the internet the following should be sufficient:

data class Person(@Min(18) var age: Int, @Size(max=10) val name: String) {
}

and the controller:

@RestController
class PersonController {
    val persons = mutableListOf<Person>()
    @GetMapping
    fun getPeople() = persons

    @PostMapping
    fun sendPerson(@Valid @RequestBody person: Person) {
        persons.add(person)
    }
}

My build.gradle contains the following dependencies:

implementation 'org.springframework.boot:spring-boot-starter-web'
implementation("org.springframework.boot:spring-boot-starter-validation")
implementation 'com.fasterxml.jackson.module:jackson-module-kotlin'
implementation 'org.jetbrains.kotlin:kotlin-reflect'

(versions are 3.1.3)

Why the annotations do not seem to do anything and how to fix it?

[kotlin-data-class-bean-validation](https://stackoverflow.com/questions/35847763/kotlin-data-class-bean-validation-jsr-303/35853200#35853200) — Andrei Lisa, Aug 31 '23 at 09:40
would be very happy to mark this as the correct answer but it's a comment, so I'll just quote you — TakiTamNerd, Aug 31 '23 at 11:25
I'm happy to help, i write an answer when i think that is more than one think to say. Enjoy ) — Andrei Lisa, Aug 31 '23 at 11:53

score 1 · Answer 1 · edited Sep 02 '23 at 13:56

1

As pointed by a comment: Kotlin creates at least a field, a getter and a constructor parameter with the syntax, so we need to tell exactly what we want to validate

TLDR: Just change to @get:Valid

edited Sep 02 '23 at 13:56

Fedor

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answered Aug 31 '23 at 11:30

TakiTamNerd

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Jakarta validation does not seem to do anything

1 Answers1