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"

	kvsMap := c[subSys]
	for tgt, kvs := range kvsMap {
		invalidKV := KVS{}
		for _, kv := range kvs {
			if !validKeysSet.Contains(kv.Key) {
				invalidKV = append(invalidKV, kv)
			}
		}
		if len(invalidKV) > 0 {
			return Errorf(
				"found invalid keys (%s) for '%s:%s' sub-system, use 'mc admin config reset myminio %s:%s' to fix invalid keys",
				invalidKV.String(), subSys, tgt, subSys, tgt)
		}
	}

                .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"

	VFMLS	V1.B16, V12.B16, V3.B16                          // ERROR "invalid arrangement"
	VFMLS	V1.H4, V12.H4, V3.H4                             // ERROR "invalid arrangement"
	VFMLS	V1.H8, V12.H8, V3.H8                             // ERROR "invalid arrangement"
	VFMLS	V1.H4, V12.H4, V3.H4                             // ERROR "invalid arrangement"

	DB.Migrator().DropTable(&Product{})
	DB.AutoMigrate(&Product{})

	p := Product{Code: "Invalid", Price: 100}
	if DB.Save(&p).Error == nil {
		t.Fatalf("An error from before create callbacks happened when create with invalid value")
	}

	if DB.Where("code = ?", "Invalid").First(&Product{}).Error == nil {
		t.Fatalf("Should not save record that have errors")
	}

		if !isAmount {
			return errors.New("invalid register extension")
		}
		switch ext {
		case "UXTB":
			if a.Type == obj.TYPE_MEM {
				return errors.New("invalid shift for the register offset addressing mode")
			}
			a.Reg = arm64.REG_UXTB + Rnum
		case "UXTH":
			if a.Type == obj.TYPE_MEM {
				return errors.New("invalid shift for the register offset addressing mode")
			}

			if op == policyCondStartsWith && !startsWithSupported {
				return fmt.Errorf("Invalid according to Policy: Policy Condition failed")
			}
			// Check if current policy condition is satisfied
			condPassed = checkPolicyCond(op, formValues.Get(formCanonicalName), policy.Value)
			if !condPassed {
				return fmt.Errorf("Invalid according to Policy: Policy Condition failed")
			}

	return &s3Error{
		code:       "InvalidColumnIndex",
		message:    "Column index in the SQL expression is invalid.",
		statusCode: 400,
		cause:      err,
	}
}

func errInvalidTextEncoding(err error) *s3Error {
	return &s3Error{
		code:       "InvalidTextEncoding",
		message:    "Invalid encoding type. Only UTF-8 encoding is supported.",
		statusCode: 400,
		cause:      err,
	}
}

constraints.CreditCardNumber.message        = {item} is invalid credit card number.
constraints.EAN.message                     = {item} is invalid {type} barcode.
constraints.Email.message                   = {item} is not a well-formed email address.
constraints.Length.message                  = Length of {item} must be between {min} and {max}.
constraints.LuhnCheck.message               = The check digit for ${value} is invalid, Luhn Modulo 10 checksum failed.