Spring validations -> @NotNull on nested objects with BigDecimal

Question

I have POST endpoint that creates for example Books, in CreateBookRequest class I have another nested class/record that holds BigDecimal price. I want to secure this endpoint so json's (given below) will be validated as BAD_REQUEST (with custom exception will be great).

My structure:

  @PostMapping(path = "/books", produces = MediaType.APPLICATION_JSON_VALUE)
  ResponseEntity<Void> createBook(@Valid @RequestBody CreateBookRequest request);

  public record CreateBookRequest(

      @Valid
      @NotNull
      Price price

  ) {
  }

  public record Price(
      @NotNull
      BigDecimal value
  ) {
  }

Correct JSON:

{
  "price": {
    "value": 60.00
  }
}

Invaluid JSON's:

{
  "price": null
}

{
  "price": ""
}

{}

My structure with validation annotations does not work at this time, any help would be appreciated, thanks in advance.

Answer 1

In my case code was fine, the missing part was the dependency:

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>