* OpenAPI *경로 처리*의 응답에 **JSON Schema**를 추가합니다.
    * 이는 **자동 문서**에서 사용됩니다.
    * 또한 자동 클라이언트 코드 생성 도구에서도 사용됩니다.
* 반환된 데이터를 Pydantic을 사용해 JSON으로 **직렬화**합니다. Pydantic은 **Rust**로 작성되어 있어 **훨씬 더 빠릅니다**.

하지만 가장 중요한 것은:

* 반환 타입에 정의된 내용으로 출력 데이터를 **제한하고 필터링**합니다.
    * 이는 특히 **보안**에 매우 중요합니다. 아래에서 더 자세히 살펴보겠습니다.

## `response_model` 매개변수 { #response-model-parameter }

    * Ceci sera également utilisé par les outils de génération automatique de code client.
* **Sérialiser** les données renvoyées en JSON en utilisant Pydantic, qui est écrit en **Rust**, ce qui sera **beaucoup plus rapide**.

Mais surtout :

* Il **limitera et filtrera** les données de sortie à ce qui est défini dans le type de retour.

            assert isinstance(response, dict), "An additional response must be a dict"
            model = response.get("model")
            if model:
                assert is_body_allowed_for_status_code(additional_status_code), (
                    f"Status code {additional_status_code} must not have a response body"
                )

* OpenAPIの *path operation* に、レスポンス用の **JSON Schema** を追加します。
    * これは**自動ドキュメント**で使用されます。
    * 自動クライアントコード生成ツールでも使用されます。
* 返却データを Pydantic を使ってJSONに**シリアライズ**します。Pydantic は内部が**Rust**で実装されているため、**非常に高速**です。

しかし、最も重要なのは:

* 戻り値の型で定義された内容に合わせて、出力データを**制限しフィルタリング**します。
    * これは**セキュリティ**の観点で特に重要です。以下で詳しく見ていきます。

## `response_model`パラメータ { #response-model-parameter }

## 0.123.2 (2025-12-02)

### Fixes

* 🐛 Fix unformatted `{type_}` in FastAPIError. PR [#14416](https://github.com/fastapi/fastapi/pull/14416) by [@Just-Helpful](https://github.com/Just-Helpful).
* 🐛 Fix parsing extra non-body parameter list. PR [#14356](https://github.com/fastapi/fastapi/pull/14356) by [@YuriiMotov](https://github.com/YuriiMotov).

   * {@code edge} will be undirected in this graph.
   *
   * <p>If this graph is directed, {@code endpoints} must be ordered.
   *
   * <p><b>{@code edge} must be unique to this graph</b>, just as a {@code Map} key must be. It must
   * also be non-null.
   *
   * <p>If either or both endpoints are not already present in this graph, this method will silently

   *     Queue<Integer>} but not a {@code Queue<Object>}).
   * @since 8.0
   */
  public static final class Builder<B> {
    /*
     * TODO(kevinb): when the dust settles, see if we still need this or can
     * just default to DEFAULT_CAPACITY.
     */
    private static final int UNSET_EXPECTED_SIZE = -1;

    private final Comparator<B> comparator;
    private int expectedSize = UNSET_EXPECTED_SIZE;

The spec also states that the `username` and `password` must be sent as form data (so, no JSON here).

### `scope` { #scope }

The spec also says that the client can send another form field "`scope`".

The form field name is `scope` (in singular), but it is actually a long string with "scopes" separated by spaces.

Each "scope" is just a string (without spaces).

    * A special case is `204`, "No Content".  This response is used when there is no content to return to the client, and so the response must not have a body.
* **`300 - 399`** are for "Redirection".  Responses with these status codes may or may not have a body, except for `304`, "Not Modified", which must not have one.
* **`400 - 499`** are for "Client error" responses. These are the second type you would probably use the most.

        // BooleanQueryCommand doesn't seem to apply boost correctly,
        // so we'll just check that it has clauses
        assertTrue(boolQueryBuilder.boost() > 0);
        // Check that the boolean query has the correct number of clauses
        assertFalse(boolQueryBuilder.must().isEmpty());
        assertFalse(boolQueryBuilder.should().isEmpty());
        assertFalse(boolQueryBuilder.mustNot().isEmpty());