Spring ResponsEntity body contains extra json with timestamp, status and more

We have an REST endpoint that will add a new empty ingredient to an existing meal:

@RequestMapping(value = "/add", method = RequestMethod.PUT, consumes = "application/json;charset=UTF-8")
public ResponseEntity<Object> add(@RequestBody final Meal meal) throws URISyntaxException

Optional<Meal> optionalMeal = mealRepository.findById(meal.getId());
if (!optionalMeal.isPresent())
return ResponseEntity
.status(HttpStatus.NOT_FOUND)
.body(MessageUtil.parse(MSG_404_MEAL, meal.getId() + ""));


Ingredient ingredient = new Ingredient();
ingredient.setMeal(optionalMeal.get());
ingredientRepository.saveAndFlush(ingredient);

ResponseEntity re = ResponseEntity
.created(RequestUtil.getResourceURI(ingredient.getId()))
.body(ingredient);

return re;



Ingredient is an entity class with some fields:

public class Ingredient implements Serializable

@Id
private Integer id;
private Meal meal;
private Grocery grocery;
private Float amount;

...



RequestUtil takes care of creating the URI where the newly created resource is to be found:

public class RequestUtil

public static URI getResourceURI(int id) throws URISyntaxException

final String url = RequestUtil.getCurrentRequest().getRequestURL().toString();
final String req = RequestUtil.omitLast(url);

return new URI(req + "get/" + id);


public static HttpServletRequest getCurrentRequest()

RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
return ((ServletRequestAttributes) requestAttributes).getRequest();


public static String omitLast(final String url)
return url.substring(0, url.lastIndexOf("/") + 1);




The http status code and resource URI end up correctly in the response headers, but the body contains two JSONs:


"id": 407,
"meal":
"id": 99,
"name": "New Meal",
"active": true
,
"grocery": null,
"amount": null,
"bought": false

"timestamp": "2018-08-29T19:25:31.466+0000",
"status": 201,
"error": "Created",
"message": "No message available",
"path": "/ingredient/add"



Our javascript code does not expect this extra data and fails with

SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 114 of the JSON data


Using a debugger, we can see that by the time the code reaches the return statement in add(), the ResponseEntity does not contain this extra data. Can someone explain where it comes from, and how we stop it from polluting the response?

Thanks for any help!

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