O `RequestValidationError` contém o `body` que ele recebeu de dados inválidos.

Você pode utilizá-lo enquanto desenvolve seu app para conectar o *body* e debugá-lo, e assim retorná-lo ao usuário, etc.

Tente enviar um item inválido como este:

```JSON
{
  "title": "towel",
  "size": "XL"
}
```

Você receberá uma *response* informando-o de que a data é inválida, e contendo o *body* recebido:

```JSON hl_lines="12-15"

this.isValid()&&(D(e)&&e.isValid()||Ha(e).isValid())?Ga({from:this,to:e}).locale(this.locale()).humanize(!a):this.localeData().invalidDate()},yt.toNow=function(e){return this.to(Ha(),e)},yt.get=function(e){return v(this[e=N(e)])?this[e]():this},yt.invalidAt=function(){return L(this).overflow},yt.isAfter=function(e,a){var t=D(e)?e:Ha(e);return!(!this.isValid()||!t.isValid())&&("millisecond"===(a=N(a)||"millisecond")?this.valueOf()>t.valueOf():t.valueOf()<this.clone().startOf(a).valueOf())},yt.isBefo...

","parseMs","proto","preParsePostFormat","time","formats","isCalendarSpec","sod","startOf","calendarFormat","asFloat","that","zoneDelta","endOf","startOfDate","isoWeekday","inputString","postformat","withoutSuffix","humanize","fromNow","toNow","invalidAt","localInput","isBetween","inclusivity","localFrom","localTo","isSame","inputMs","isSameOrAfter","isSameOrBefore","parsingFlags","prioritized","unitsObj","u","getPrioritizedUnits","toArray","toObject","toDate","toISOString","keepOffset","inspect...

                .replace(CACHE_AND_SESSION_INVALIDATE_STATEMENT, "<% }catch(Exception e){session.invalidate();} %>");
    }

    public static String encodeJsp(final String value) {
        return value.replace("<% try{ %>", TRY_STATEMENT).replace("<% }catch(Exception e){session.invalidate();} %>",
                CACHE_AND_SESSION_INVALIDATE_STATEMENT);
    }

	SWPW.S	R1, (R2), R3       // ERROR "invalid .S suffix"
	MOVF.S	(R0), F1           // ERROR "invalid .S suffix"
	MOVF.S	F9, (R4)           // ERROR "invalid .S suffix"
	MOVF.S	0xfff0(R0), F1     // ERROR "invalid .S suffix"
	MOVF.S	F9, 0xfff0(R4)     // ERROR "invalid .S suffix"
	ADDF.S	F1, F2, F3         // ERROR "invalid .S suffix"
	SUBD.U	F1, F2             // ERROR "invalid .U suffix"

		Code:           "NoSuchUpload",
		Description:    "The specified multipart upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.",
		HTTPStatusCode: http.StatusNotFound,
	},
	ErrInvalidVersionID: {
		Code:           "InvalidArgument",
		Description:    "Invalid version id specified",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrNoSuchVersion: {

              },
              "invalid": {
                "delay": 0,
                "message": "This was marked as invalid and will be closed now. If this is an error, please provide additional details."
              }

        if (froms.length != 2) {
            throw new FessSystemException("Invalid format: " + time);
        }
        final int[] values = new int[2];
        values[0] = Integer.parseInt(froms[0]);
        if (values[0] < 0 || values[0] > 23) {
            throw new FessSystemException("Invalid format: " + time);
        }
        values[1] = Integer.parseInt(froms[1]);

    status->status = tensorflow::errors::InvalidArgument(
        "Invalid tensorflow.ServerDef protocol buffer");
    return;
  } else if (context->GetContextId() ==
             tensorflow::EagerContext::kInvalidContextId) {
    status->status = tensorflow::errors::InvalidArgument(
        "Trying to update a context with invalid context id.");
  }
  status->status =

These handlers are in charge of returning the default JSON responses when you `raise` an `HTTPException` and when the request has invalid data.

You can override these exception handlers with your own.

### Override request validation exceptions

When a request contains invalid data, **FastAPI** internally raises a `RequestValidationError`.

And it also includes a default exception handler for it.