# ボディ - フィールド

`Query`や`Path`、`Body`を使って *path operation関数* のパラメータに追加のバリデーションやメタデータを宣言するのと同じように、Pydanticの`Field`を使ってPydanticモデルの内部でバリデーションやメタデータを宣言することができます。

## `Field`のインポート

まず、以下のようにインポートします:

{* ../../docs_src/body_fields/tutorial001.py hl[4] *}

/// warning | 注意

`Field`は他の全てのもの（`Query`、`Path`、`Body`など）とは違い、`fastapi`からではなく、`pydantic`から直接インポートされていることに注意してください。

///

## モデルの属性の宣言

以下のように`Field`をモデルの属性として使用することができます:

			Op:   "open",
			Path: path,
			Err:  syscall.EINVAL,
		}
	}

	f, err := os.OpenFile(path, flag|syscall.O_SYNC, perm)
	if err != nil {
		return nil, err
	}

	if err = syscall.Flock(int(f.Fd()), lockType); err != nil {
		f.Close()
		if err == syscall.EWOULDBLOCK {
			err = ErrAlreadyLocked
		}
		return nil, err
	}

	st, err := os.Stat(path)
	if err != nil {
		f.Close()

        // Verify the path is included
        String writtenPath = readStringFromBuffer(buffer, 12, written - 12);
        assertEquals("\\test\\dir\\*.txt", writtenPath);
    }

    @ParameterizedTest
    @DisplayName("Test writeParametersWireFormat with various wildcards")
    @CsvSource({ "'\\path', '*.txt', '\\path\\*.txt'", "'\\path\\', '*.doc', '\\path\\*.doc'", "'\\', '*.*', '\\*.*'",

                </extensions>
                """;
        Path dotMvn = cwd.resolve(".mvn");
        Files.createDirectories(dotMvn);
        Path projectExtensions = dotMvn.resolve("extensions.xml");
        Files.writeString(projectExtensions, extensionsXml);

        Path userConf = userHome.resolve(".m2");
        Files.createDirectories(userConf);
        Path userExtensions = userConf.resolve("extensions.xml");

Similar a como puedes [agregar `dependencies` a los *path operation decorators*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, puedes agregarlos a la aplicación de `FastAPI`.

En ese caso, se aplicarán a todas las *path operations* en la aplicación:

{* ../../docs_src/dependencies/tutorial012_an_py39.py hl[17] *}

     * Downloads an object from storage.
     *
     * @param objectName the name/path of the object to download
     * @param outputStream the output stream to write data to
     */
    void downloadObject(String objectName, OutputStream outputStream);

    /**
     * Deletes an object from storage.
     *
     * @param objectName the name/path of the object to delete
     */
    void deleteObject(String objectName);

    /**

     * @param path the {@link Path}, must not be {@code null}
     * @throws ProjectBuilderException if the project cannot be created
     * @throws IllegalArgumentException if an argument is {@code null} or invalid
     * @see #build(ProjectBuilderRequest)
     */
    @Nonnull
    default ProjectBuilderResult build(@Nonnull Session session, @Nonnull Path path) throws ProjectBuilderException {

///

## Declare atributos do modelo { #declare-model-attributes }

Você pode então utilizar `Field` com atributos do modelo:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

`Field` funciona da mesma forma que `Query`, `Path` e `Body`, ele possui todos os mesmos parâmetros, etc.

/// note | Detalhes Técnicos

    }

    /** @return the path */
    public String getPath() {
        return this.path;
    }

    public List<ArtifactRepository> getRemoteRepositories() {
        return remoteRepositories;
    }

    public String getOriginalMessage() {
        return originalMessage;
    }

    protected static String constructArtifactPath(List<String> path, String indentation) {

<components>
	<include path="convention.xml"/>
	<include path="lastaflute.xml"/>
	<include path="lasta_job.xml"/>

	<include path="fess.xml"/>
	<include path="fess_api.xml"/>
	<include path="fess_cors.xml"/>
	<include path="fess_dict.xml"/>
	<include path="fess_job.xml"/>
	<include path="fess_ldap.xml"/>
	<include path="fess_query.xml"/>
	<include path="fess_rankfusion.xml"/>
	<include path="fess_score.xml"/>