Ignoring empty fields in spring boot api requestbody

Question

I have a controller in my application that accepts logs. When I send an empty json object ('{}') or valid requests but with one or more empty fields, it is automatically deserialised into an empty LogDTO object or a LogDTO with a field set to 0 (for numerical fields). I want to reject requests with empty fields.

My controller:

@PostMapping("new/log")
public ResponseEntity<Log> newLog(@Valid @RequestBody LogDTO logDTO) {
    return new ResponseEntity<>(logService.newLog(logDTO), HttpStatus.OK);
}

LogDTO object:

public class LogDTO {

/**
 * The date and time for this specific log, in miliseconds since epoch.
 */
@Min(0)
@NotNull
@JsonInclude(JsonInclude.Include.NON_NULL)
private long epochDate;

/**
 * The heartRate per minute for this specific time.
 */
@Min(0)
@NotNull
@JsonInclude(JsonInclude.Include.NON_NULL)
private int heartRate;

/**
 * The user this log belongs to.
 */
@Min(0)
@NotNull
@JsonInclude(JsonInclude.Include.NON_NULL)
private long userId;

/**
 * The night this log belongs to. Every sleepsession represents one night.
 */
@Min(0)
@NotNull
@JsonInclude(JsonInclude.Include.NON_NULL)
private long sleepSession;

public LogDTO() {
}

public LogDTO(long epochDate, int heartRate, long userId, long sleepSession) {
    this.epochDate = epochDate;
    this.heartRate = heartRate;
    this.userId = userId;
    this.sleepSession = sleepSession;
}
//getters and setters

I tried setting 'spring.jackson.default-property-inclusion=non-default' in my application properties too, but it kept setting the fields to '0'. Is there any way I can either set empty fields to 'null' instead of '0', or reject the object in validation?

Can you change to Wrapper types instead of primitives? Integer instead of int and Long instead of long — Tushar, Nov 30 '20 at 15:27
Take a look on this: [Jackson @JsonProperty(required=true) doesn't throw an exception](https://stackoverflow.com/questions/18320731/jackson-jsonpropertyrequired-true-doesnt-throw-an-exception) — Michał Ziober, Nov 30 '20 at 20:59
@Tushar I could, with some refactoring. What would that change for me? — TheDokter, Nov 30 '20 at 22:05
When you use primitives it is defaulted to zero instead of null. I tried and with Wrapper type you get a validation exception. — Tushar, Dec 01 '20 at 09:14

score 0 · Accepted Answer · answered Dec 01 '20 at 14:09

0

As @Tushar mentioned in the comments, changing my types in my LogDTO object from primitive types to wrappers solved my issue.

answered Dec 01 '20 at 14:09

TheDokter

23
2

Ignoring empty fields in spring boot api requestbody

1 Answers1