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.

gcpdev-guy · Accepted Answer · 2023-02-23 15:50:11Z

1

Written a small app using spring boot 3.0.0 and JDK 19 and everything worked perfectly fine for me. Here are the snippets

@RestController
public class BookController {
    @PostMapping(path = "/books", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<String> createBook(@Valid @RequestBody CreateBookRequest request){
        if(request.getPrice().value() != null){
            return ResponseEntity.ok().body("Good request");
        }
        return ResponseEntity.badRequest().body("Check the request");
    }
}


import jakarta.validation.Valid;
import jakarta.validation.constraints.NotNull;
public class CreateBookRequest {
    @Valid
    @NotNull
    Price price;
    public Price getPrice() {
        return price;
    }
    public void setPrice(Price price) {
        this.price = price;
    }
}


public record Price(
        @NotNull
        BigDecimal value
) {
    public Price(BigDecimal value){
        this.value = value;
        }
}

answered Feb 23, 2023 at 15:50

gcpdev-guy

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1 Comment

bmrki Over a year ago

Thanks for answer, for me it was the missing dependencyu.

bmrki · Accepted Answer · 2023-02-24 07:43:11Z

0

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>

answered Feb 24, 2023 at 7:43

bmrki

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