{* ../../docs_src/request_form_models/tutorial002_an_py310.py hl[12] *}

Bir client fazladan veri göndermeye çalışırsa, bir **error** response alır.

Örneğin, client şu form field'larını göndermeye çalışırsa:

* `username`: `Rick`
* `password`: `Portal Gun`
* `extra`: `Mr. Poopybutthole`

`extra` field'ının izinli olmadığını söyleyen bir error response alır:

```json
{
    "detail": [
        {

                    lmHash = new byte[(password.length() + 1) * 2];
                    ntHash = new byte[0];
                    writeString(password, lmHash, 0);
                }
                accountName = auth.username;
                if (useUnicode) {
                    accountName = accountName.toUpperCase();
                }
                primaryDomain = auth.domain.toUpperCase();
            } else if (cred instanceof byte[]) {

Mais vous n'êtes pas limité à un modèle, une classe ou un type de données spécifique.

Voulez-vous avoir un `id` et `email` et ne pas avoir de `username` dans votre modèle ? Bien sûr. Vous pouvez utiliser ces mêmes outils.

```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {
        "username": "dave",
        "full_name": "Dave Grohl"
    }
}
```

/// note | Заметка

        // Configure mock session
        mockSession.transport = mockTransport;

        // Configure authentication - set fields directly since NtlmPasswordAuthentication is final
        mockAuth.username = "testuser";
        mockAuth.domain = "TESTDOMAIN";
        mockAuth.password = "testpass";

        when(mockAuth.getAnsiHash(any(byte[].class))).thenReturn(new byte[24]);

            },
        ],
    }


def test_post_missing_required_field_in_item(client: TestClient):
    response = client.put(
        "/items/5", json={"item": {"name": "Foo"}, "user": {"username": "johndoe"}}
    )
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "input": {"name": "Foo"},
                "loc": [

type iamCache struct {
	updatedAt time.Time

	// map of policy names to policy definitions
	iamPolicyDocsMap map[string]PolicyDoc

	// map of regular username to credentials
	iamUsersMap map[string]UserIdentity
	// map of regular username to policy names
	iamUserPolicyMap *xsync.MapOf[string, MappedPolicy]

	// STS accounts are loaded on demand and not via the periodic IAM reload.

{* ../../docs_src/request_form_models/tutorial002_an_py310.py hl[12] *}

Si un cliente intenta enviar datos extra, recibirá un response de **error**.

Por ejemplo, si el cliente intenta enviar los campos de formulario:

* `username`: `Rick`
* `password`: `Portal Gun`
* `extra`: `Mr. Poopybutthole`

Recibirá un response de error indicando que el campo `extra` no está permitido:

```json
{
    "detail": [
        {

Use `Response.challenges()` to get the schemes and realms of any authentication challenges. When fulfilling a `Basic` challenge, use `Credentials.basic(username, password)` to encode the request header.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient.Builder()
          .authenticator(object : Authenticator {

                .put("http.heartbeat_interval", fessConfig.getFesenHeartbeatInterval());
        final String username = fessConfig.getFesenUsername();
        final String password = fessConfig.getFesenPassword();
        if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
            builder.put(Constants.FESEN_USERNAME, username);
            builder.put(Constants.FESEN_PASSWORD, password);
        }