# Retornos Adicionais no OpenAPI { #additional-responses-in-openapi }

/// warning | Atenção

Este é um tema bem avançado.

Se você está começando com o **FastAPI**, provavelmente você não precisa disso.

///

Você pode declarar retornos adicionais, com códigos de status adicionais, media types, descrições, etc.

Essas respostas adicionais serão incluídas no esquema do OpenAPI, e também aparecerão na documentação da API.

# Responses Adicionales en OpenAPI { #additional-responses-in-openapi }

/// warning | Advertencia

Este es un tema bastante avanzado.

Si estás comenzando con **FastAPI**, puede que no lo necesites.

///

Puedes declarar responses adicionales, con códigos de estado adicionales, media types, descripciones, etc.

Esos responses adicionales se incluirán en el esquema de OpenAPI, por lo que también aparecerán en la documentación de la API.

# Zusätzliche Responses in OpenAPI { #additional-responses-in-openapi }

/// warning | Achtung

Dies ist ein eher fortgeschrittenes Thema.

Wenn Sie mit **FastAPI** beginnen, benötigen Sie dies möglicherweise nicht.

///

Sie können zusätzliche <abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Responses</abbr> mit zusätzlichen Statuscodes, Medientypen, Beschreibungen, usw. deklarieren.

# Additional Responses in OpenAPI { #additional-responses-in-openapi }

/// warning

This is a rather advanced topic.

If you are starting with **FastAPI**, you might not need this.

///

You can declare additional responses, with additional status codes, media types, descriptions, etc.

Those additional responses will be included in the OpenAPI schema, so they will also appear in the API docs.

もしなんらかの理由でアンダースコアからハイフンへの自動変換を無効にする必要がある場合は、`Header`の`convert_underscores`に`False`を設定してください:

{* ../../docs_src/header_params/tutorial002.py hl[9] *}

/// warning | 注意

`convert_underscores`を`False`に設定する前に、HTTPプロキシやサーバの中にはアンダースコアを含むヘッダーの使用を許可していないものがあることに注意してください。

///

## ヘッダーの重複

受信したヘッダーが重複することがあります。つまり、同じヘッダーで複数の値を持つということです。

これらの場合、リストの型宣言を使用して定義することができます。

   * NullPointerException} on null input.
   *
   * <p><b>Warning:</b> The returned function may not be <i>consistent with equals</i> (as
   * documented at {@link Function#apply}). For example, this function yields different results for
   * the two equal instances {@code ImmutableSet.of(1, 2)} and {@code ImmutableSet.of(2, 1)}.
   *
   * <p><b>Warning:</b> as with all function types in this package, avoid depending on the specific

									title="<la:message key="labels.development_mode_warning" />"
								><a class="nav-link active" href="${installationLink}" target="_olh"><em
										class="fa fa-exclamation-triangle text-warning"
									></a></li>
							</c:if>
							<c:choose>
								<c:when test="${!empty username && username != 'guest'}">
									<li class="nav-item">
										<div class="dropdown">

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