pkg database/sql, type Null[$0 interface{}] struct #60370
pkg database/sql, type Null[$0 interface{}] struct, V $0 #60370
pkg database/sql, type Null[$0 interface{}] struct, Valid bool #60370
pkg debug/elf, const R_LARCH_64_PCREL = 109 #63725
pkg debug/elf, const R_LARCH_64_PCREL R_LARCH #63725
pkg debug/elf, const R_LARCH_ADD6 = 105 #63725
pkg debug/elf, const R_LARCH_ADD6 R_LARCH #63725

	// have the same port
	if addr1Local && addr2Local {
		if port1 == port2 {
			return true, nil
		}
	}
	return false, nil
}

// CheckLocalServerAddr - checks if serverAddr is valid and local host.
func CheckLocalServerAddr(serverAddr string) error {
	host, err := xnet.ParseHost(serverAddr)
	if err != nil {
		return config.ErrInvalidAddressFlag(err)
	}

def indent_xml(elem, level=0) -> None:
  """Indents and newlines the XML for better output."""
  indent_str = '\n' + level * '  '
  if len(elem):  # pylint: disable=g-explicit-length-test  # `if elem` not valid
    if not elem.text or not elem.text.strip():
      elem.text = indent_str + '  '
    if not elem.tail or not elem.tail.strip():
      elem.tail = indent_str
    for elem in elem:
      indent_xml(elem, level + 1)

Puedes declarar que un parámetro puede aceptar `None`, pero que aún así es requerido. Esto obligaría a los clientes a enviar un valor, incluso si el valor es `None`.

Para hacer eso, puedes declarar que `None` es un tipo válido pero aún usar `...` como el valor por defecto:

{* ../../docs_src/query_params_str_validations/tutorial006c_an_py310.py hl[9] *}

/// tip | Consejo

        assertNotNull(option);
        assertTrue(option.startsWith("-D" + Constants.FESS_THUMBNAIL_PATH + "="));
        assertTrue(option.contains(tempDir.getAbsolutePath()));
    }

    // Test offer with valid generator
    public void test_offer_withValidGenerator() {
        TestThumbnailGenerator generator = new TestThumbnailGenerator();
        generator.available = true;
        generator.target = true;

```

</div>

Então, vá para a interface `/docs`, você verá que o **FastAPI** está usando esses **modelos** para **documentar** a API, e ele também os usará para **serializar** e **validar** os dados.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Atualizar o App com Múltiplos Modelos

                            + ": " + sae);
                }
                if (sae.getNtStatus() == NtStatus.NT_STATUS_ACCESS_VIOLATION) {
                    /* Server challenge no longer valid for
                     * externally supplied password hashes.
                     */
                    final HttpSession ssn = req.getSession(false);
                    if (ssn != null) {

    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...as `description` and `tax` are optional (with a default value of `None`), this JSON "`object`" would also be valid:

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Declare it as a parameter { #declare-it-as-a-parameter }

        }
    }

    @Test
    void testConstructorAndGettersWithValidTicket() throws IOException, GeneralSecurityException, PACDecodingException {
        // Test successful instantiation and getter methods with a valid ticket
        byte[] validToken = createTestTicketBytes(new BigInteger(KerberosConstants.KERBEROS_VERSION), SERVER_REALM, SERVER_PRINCIPAL_NAME,
                ENCRYPTION_TYPE, ENCRYPTED_DATA, null);

        } catch (final InterruptedException ie) {
            state = 0;
            thread = null;
            throw new TransportException(ie);
        } finally {
            /* This guarantees that we leave in a valid state
             */
            if (state != 0 && state != 3 && state != 4) {
                if (LogStream.level >= 1) {
                    log.println("Invalid state: " + state);
                }