* Only indices matching the specified target prefixes are rebuilt.
     * For each index: creates a backup, reindexes data, creates a new index, reindexes from backup,
     * atomically switches aliases, then cleans up old and backup indices.
     *
     * @param loadBulkData    whether to load default bulk data after rebuilding (using OpType.CREATE to skip existing documents)

    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
)

@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
if exist %WRAPPER_JAR% (
    if "%MVNW_VERBOSE%" == "true" (
        echo Found %WRAPPER_JAR%
    )
) else (
    if not "%MVNW_REPOURL%" == "" (

        response.subCommand = SmbComTransaction.TRANS2_FIND_NEXT2;
        String actual = response.toString();
        assertTrue(actual.startsWith("Trans2FindNext2Response["));
    }

    // Helper methods to write data to byte arrays for testing read methods
    private void writeInt2(int val, byte[] dst, int dstIndex) {
        dst[dstIndex] = (byte) val;
        dst[dstIndex + 1] = (byte) (val >> 8);
    }

dataclass는 자동으로 Pydantic dataclass로 변환됩니다.

이렇게 하면 해당 스키마가 API docs 사용자 인터페이스에 표시됩니다:

<img src="/img/tutorial/dataclasses/image01.png">

## 중첩 데이터 구조에서 Dataclasses 사용하기 { #dataclasses-in-nested-data-structures }

`dataclasses`를 다른 타입 애너테이션과 조합해 중첩 데이터 구조를 만들 수도 있습니다.

일부 경우에는 Pydantic 버전의 `dataclasses`를 사용해야 할 수도 있습니다. 예를 들어 자동 생성된 API 문서에서 오류가 발생하는 경우입니다.

不过通常你无需操心，这些都会自动完成，继续阅读即可。🤓

///

## 使用场景 { #use-cases }

你可以用它来从 AI LLM 服务、日志或遥测中流式传输数据，或其他可以用 JSON 项目来结构化的数据。

/// tip | 提示

如果你想流式传输二进制数据，例如视频或音频，请查看进阶指南：[流式传输数据](../advanced/stream-data.md)。

///

## 使用 FastAPI 流式传输 JSON Lines { #stream-json-lines-with-fastapi }

要在 FastAPI 中流式传输 JSON Lines，可以在路径操作函数中不用 `return`，而是用 `yield` 逐个产生每个数据项。

	}

	if m.error == "" && update.error != "" {
		m.error = update.error
		m.status = scanStateError
		m.ended = now
	}
	m.fileNotFound = m.fileNotFound || update.fileNotFound
}

// delete all cache data on disks.
func (m *metacache) delete(ctx context.Context) {
	if m.bucket == "" || m.id == "" {
		bugLogIf(ctx, fmt.Errorf("metacache.delete: bucket (%s) or id (%s) empty", m.bucket, m.id))
		return
	}

The following self-signed certificate is issued for `consoleAdmin`. So, MinIO would associate it with the pre-defined `consoleAdmin` policy.

```
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            35:ac:60:46:ad:8d:de:18:dc:0b:f6:98:14:ee:89:e8
        Signature Algorithm: ED25519
        Issuer: CN = consoleAdmin
        Validity

        final boolean result = testClient.reindexConfigIndices(true, allTargetPrefixes());

        assertTrue(result);
        // During rebuild, addMapping is always called with loadBulkData=false
        // because bulk data is loaded separately with createOnly=true via insertBulkData.
        for (final String[] call : testClient.addMappingCalls) {
            assertNotNull(call);
        }

* `id`
* `name`
* `age`
* `secret_name`

{* ../../docs_src/sql_databases/tutorial002_an_py310.py ln[7:14] hl[12:14] *}

#### `HeroPublic` - 公共*数据模型* { #heropublic-the-public-data-model }

接下来，我们创建一个 `HeroPublic` 模型，这是将**返回**给 API 客户端的模型。

它包含与 `HeroBase` 相同的字段，因此不会包括 `secret_name`。

终于，我们英雄的身份得到了保护！🥷

        }

        @Override
        public void commit() {
            /* No-op */ }

        @Override
        public void store(DataStoreParams params, java.util.Map<String, Object> data) {
            /* No-op */ }
    }

    private static class FastMockDataStoreFactory extends DataStoreFactory {
        @Override
        public DataStore getDataStore(String name) {