通过创建仅专用于与数据库交互（获取用户或项目）的函数，独立于*路径操作函数*，您可以更轻松地在多个部分中重用它们，并为它们添加单元测试。

///

### 创建数据

现在创建工具函数来创建数据。

它的步骤是：

* 使用您的数据创建一个 SQLAlchemy 模型*实例。*
* 使用`add`来将该实例对象添加到数据库会话。
* 使用`commit`来将更改提交到数据库（以便保存它们）。
* 使用`refresh`来刷新您的实例对象（以便它包含来自数据库的任何新数据，例如生成的 ID）。

```Python hl_lines="18-24  31-36"
{!../../docs_src/sql_databases/sql_app/crud.py!}
```

/// tip

## Software Metrics

| Name                          | Description                            |
|:------------------------------|:---------------------------------------|
| `minio_software_commit_info`  | Git commit hash for the MinIO release. |
| `minio_software_version_info` | MinIO Release tag for the server.      |

## Drive Metrics

	respBody, err := client.callWithContext(ctx, peerRESTMethodVerifyBinary, values, reader, -1)
	if err != nil {
		return err
	}
	defer xhttp.DrainBody(respBody)
	return nil
}

// CommitBinary - sends commit binary message to remote peers.
func (client *peerRESTClient) CommitBinary(ctx context.Context) error {
	respBody, err := client.callWithContext(ctx, peerRESTMethodCommitBinary, nil, nil, -1)
	if err != nil {
		return err

crawler.document.cache.html.mimetypes=text/html

# indexer
indexer.thread.dump.enabled=true
indexer.unprocessed.document.size=1000
indexer.click.count.enabled=true
indexer.favorite.count.enabled=true
indexer.webfs.commit.margin.time=5000
indexer.webfs.max.empty.list.count=3600
indexer.webfs.update.interval=10000
indexer.webfs.max.document.cache.size=10
indexer.webfs.max.document.request.size=1048576

	// Save current erasure metadata for validation.
	currentFI := fi

	// Allocate parts similar to incoming slice.
	fi.Parts = make([]ObjectPartInfo, len(parts))

	// Validate each part and then commit to disk.
	for i, part := range parts {
		partIdx := objectPartIndex(currentFI.Parts, part.PartNumber)
		// All parts should have same part number.
		if partIdx == -1 {
			invp := InvalidPart{

	}
}

func getMinIOCommitMD() MetricDescription {
	return MetricDescription{
		Namespace: minioMetricNamespace,
		Subsystem: softwareSubsystem,
		Name:      commitInfo,
		Help:      "Git commit hash for the MinIO release",
		Type:      gaugeMetric,
	}
}

func getS3TTFBDistributionMD() MetricDescription {
	return MetricDescription{
		Namespace: s3MetricNamespace,

make sure the software is free for all its users. This General Public
License applies to most of the Free Software Foundation's software and
to any other program whose authors commit to using it. (Some other Free
Software Foundation software is covered by the GNU Library General
Public License instead.) You can apply it to your programs, too.

  This section can be blank if this pull request does not require a release note.
  
  When adding links which point to resources within git repositories, like
  KEPs or supporting documentation, please reference a specific commit and avoid
  linking directly to the master branch. This ensures that links reference a
  specific point in time, rather than a document that may change over time.
  

			}
			return res, osErrToFileErr(err)
		}
		diskHealthCheckOK(ctx, err)
	}

	if contextCanceled(ctx) {
		return res, ctx.Err()
	}

	// Commit meta-file
	if err = renameAll(srcFilePath, dstFilePath, skipParent); err != nil {
		if legacyPreserved {
			// Any failed rename calls un-roll previous transaction.

    /**
     * Get the value for the key 'indexer.webfs.commit.margin.time'. <br>
     * The value is, e.g. 5000 <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexerWebfsCommitMarginTime();

    /**
     * Get the value for the key 'indexer.webfs.commit.margin.time' as {@link Integer}. <br>
     * The value is, e.g. 5000 <br>