kotlin and @Valid Spring annotation

Question

I have an entity:

class SomeInfo(
        @NotNull @Pattern(regexp = Constraints.EMAIL_REGEX) var value: String) {
    var id: Long? = null
}

Answer 1

If you use IntelliJ to convert Java to Kotlin, the @Valid annotation in the Spring Controller method may eventually be attached to the type, instead of the variable. This would break the validation.

For example, the convertion could result in

@PostMapping
public Id create(@RequestBody someInfo: @Valid SomeInfo) {
    ...
}

This is not validating. The @Valid has to be moved to a variable like this:

@PostMapping
public Id create(@RequestBody @Valid someInfo: SomeInfo) {
    ...
}