Name      string
	Prefix    string
	KeyMarker string

	// When response is truncated (the IsTruncated element value in the response
	// is true), you can use the key name in this field as marker in the subsequent
	// request to get next set of objects. Server lists objects in alphabetical
	// order Note: This element is returned only if you have delimiter request parameter

| ![Dashboard](https://github.com/minio/minio/blob/master/docs/screenshots/pic1.png?raw=true) | ![Dashboard](https://github.com/minio/minio/blob/master/docs/screenshots/pic2.png?raw=true) |

## Test using MinIO Client `mc`

    server.useHttps(handshakeCertificates.sslSocketFactory())
    val queueDispatcher = QueueDispatcher()
    queueDispatcher.enqueueResponse(MockResponse(inTunnel = true))
    queueDispatcher.enqueueResponse(MockResponse(inTunnel = true))
    queueDispatcher.enqueueResponse(MockResponse(body = "call2 response"))
    queueDispatcher.enqueueResponse(MockResponse(body = "call1 response"))

  public static boolean equalsIgnoreCase(CharSequence s1, CharSequence s2) {
    // Calling length() is the null pointer check (so do it before we can exit early).
    int length = s1.length();
    if (s1 == s2) {
      return true;
    }
    if (length != s2.length()) {
      return false;
    }
    for (int i = 0; i < length; i++) {
      char c1 = s1.charAt(i);
      char c2 = s2.charAt(i);
      if (c1 == c2) {

  // There are a maximum of 64 match conditions allowed.
  //
  // The exact matching logic is (in order):
  //   1. If ANY matchCondition evaluates to FALSE, the webhook is skipped.
  //   2. If ALL matchConditions evaluate to TRUE, the webhook is called.
  //   3. If any matchCondition evaluates to an error (but none are FALSE):
  //      - If failurePolicy=Fail, reject the request

 *
 * @author Jesse Wilson
 * @author Kevin Bourrillion
 * @since 2.0
 */
@DoNotMock("Use ImmutableMap.of or another implementation")
@GwtCompatible(serializable = true, emulated = true)
@SuppressWarnings("serial") // we're overriding default serialization
@ElementTypesAreNonnullByDefault
public abstract class ImmutableMap<K, V> implements Map<K, V>, Serializable {

  /**

    try {
      constructor = type.getConstructor();
    } catch (NoSuchMethodException e) {
      return arbitraryConstantInstanceOrNull(type);
    }
    constructor.setAccessible(true); // accessibility check is too slow
    try {
      return constructor.newInstance();
    } catch (InstantiationException | IllegalAccessException impossible) {
      throw new AssertionError(impossible);

	}

	if name := DB.Dialector.Name(); name == "postgres" {
		stmt := gorm.Statement{DB: DB}
		stmt.Parse(&Blog{})
		stmt.Schema.LookUpField("ID").Unique = true
		stmt.Parse(&Tag{})
		stmt.Schema.LookUpField("ID").Unique = true
		// postgers only allow unique constraint matching given keys
	}

	DB.Migrator().DropTable(&Blog{}, &Tag{}, "blog_tags", "locale_blog_tags", "shared_blog_tags")

			Name:  tier,
			Type:  globalTierConfigMgr.TierType(tier),
			Stats: stats,
		})
	}

	sort.Slice(infos, func(i, j int) bool {
		if infos[i].Type == "internal" {
			return true
		}
		if infos[j].Type == "internal" {
			return false
		}
		return infos[i].Name < infos[j].Name
	})
	return infos
}

func (dui DataUsageInfo) tierMetrics() (metrics []MetricV2) {

**FastAPI** 对此没有任何限制，可以**随意**互换使用这两种操作。

但本指南也会分别介绍这两种操作各自的用途。

///

### 使用 Pydantic 的 `exclude_unset` 参数

更新部分数据时，可以在 Pydantic 模型的 `.dict()` 中使用 `exclude_unset` 参数。

比如，`item.dict(exclude_unset=True)`。

这段代码生成的 `dict` 只包含创建 `item` 模型时显式设置的数据，而不包括默认值。

然后再用它生成一个只含已设置（在请求中所发送）数据，且省略了默认值的 `dict`：

```Python hl_lines="34"
{!../../docs_src/body_updates/tutorial002.py!}
```

### 使用 Pydantic 的 `update` 参数