**FastAPI** will **extract** the data for **each field** from the **form data** in the request and give you the Pydantic model you defined.

## Check the Docs { #check-the-docs }

You can verify it in the docs UI at `/docs`:

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## Forbid Extra Form Fields { #forbid-extra-form-fields }

You can read more details about the <a href="https://www.starlette.dev/requests/" class="external-link" target="_blank">`Request` object in the official Starlette documentation site</a>.

/// note | Technical Details

You could also use `from starlette.requests import Request`.

**FastAPI** provides it directly just as a convenience for you, the developer. But it comes directly from Starlette.

**FastAPI**는 요청에서 받은 **폼 데이터**에서 **각 필드**에 대한 데이터를 **추출**하고 정의한 Pydantic 모델을 줍니다.

## 문서 확인하기

문서 UI `/docs`에서 확인할 수 있습니다:

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## 추가 폼 필드 금지하기

일부 특별한 사용 사례(흔하지는 않겠지만)에서는 Pydantic 모델에서 정의한 폼 필드를 **제한**하길 원할 수도 있습니다. 그리고 **추가** 필드를 **금지**할 수도 있습니다.

/// note | 참고

                () -> newModelResolver().resolveModel(parent),
                "Expected 'UnresolvableModelException' not thrown.");
        assertNotNull(e.getMessage());
        assertEquals("No versions matched the requested parent version range '[2.0,2.1)'", e.getMessage());
    }

    @Test
    void testResolveParentThrowsUnresolvableModelExceptionWhenUsingRangesWithoutUpperBound() throws Exception {
        final Parent parent = new Parent();

		return S3KMS, true
	case SSEC.IsRequested(h):
		return SSEC, true
	default:
		return nil, false
	}
}

// Requested returns whether any type of encryption is requested.
func Requested(h http.Header) bool {
	return S3.IsRequested(h) || S3KMS.IsRequested(h) || SSEC.IsRequested(h)
}

// UnsealObjectKey extracts and decrypts the sealed object key
// from the metadata using the SSE-Copy client key of the HTTP headers

  /** Sets the [real] address for [requested].  */
  operator fun set(
    requested: InetAddress,
    real: InetSocketAddress,
  ) {
    hostMapping[requested] = real
  }

  override fun createSocket(): Socket =
    object : Socket() {
      override fun connect(
        endpoint: SocketAddress?,
        timeout: Int,
      ) {
        val requested = (endpoint as InetSocketAddress)

	var deploymentID string
	if entry.DeploymentID != "" {
		deploymentID = "\nDeploymentID: " + entry.DeploymentID
	}

	var requestID string
	if entry.RequestID != "" {
		requestID = "\nRequestID: " + entry.RequestID
	}

	var remoteHost string
	if entry.RemoteHost != "" {
		remoteHost = "\nRemoteHost: " + entry.RemoteHost
	}

	var host string
	if entry.Host != "" {

    }

    /**
     * Gets the requested lease state flags
     * @return the requested lease state
     */
    public int getLeaseState() {
        return leaseState;
    }

    /**
     * Sets the requested lease state flags
     * @param leaseState the lease state to set
     */
    public void setLeaseState(int leaseState) {
        this.leaseState = leaseState;
    }

    /**

        List<MetadataResult> results = repositorySystem.resolveMetadata(request.getRepositorySession(), requests);
        requests.clear();

        PluginPrefixResult result = processResults(request, trace, results, requests, candidates);

        if (result != null) {
            return result;
        }

        // second try, refetch all (possibly outdated) metadata that wasn't updated in the first attempt

/// note | Technische Details

Ein `Request` hat ein `request.scope`-Attribut, welches einfach ein Python-<abbr title="Dictionary – Zuordnungstabelle: In anderen Sprachen auch Hash, Map, Objekt, Assoziatives Array genannt">`dict`</abbr> ist, welches die mit dem Request verbundenen Metadaten enthält.

Ein `Request` hat auch ein `request.receive`, welches eine Funktion ist, die den Body des Requests <abbr title="Englisch „receive“">empfängt</abbr>.