///

## Ohne Pydantic

因为默认值是 `None`， FastAPI 会把 `q` 当作可选参数。

FastAPI 不使用 `Optional[str]` 中的 `Optional`， 但 `Optional` 可以让编辑器提供更好的支持，并检测错误。

///

## 不使用 Pydantic

///

## Sem o Pydantic

	}

	if err := ValidateFilterRuleValue(filter.Value); err != nil {
		return err
	}

	*filter = FilterRule(rule)

	return nil
}

// FilterRuleList - represents multiple <FilterRule>...</FilterRule>
type FilterRuleList struct {
	Rules []FilterRule `xml:"FilterRule,omitempty"`
}

// UnmarshalXML - decodes XML data.

	}
	return []madmin.KMSKeyInfo{}, "", nil
}

// CreateKey returns ErrKeyExists unless req.Name is equal to the secretKey name.
// The builtin KMS does not support creating multiple keys.
func (s secretKey) CreateKey(_ context.Context, req *CreateKeyRequest) error {
	if req.Name != s.keyID {
		return ErrNotSupported
	}
	return ErrKeyExists
}

  // Verbs is a list of Verbs that apply to ALL the ResourceKinds contained in this rule. '*' represents all verbs.
  repeated string verbs = 1;

  // APIGroups is the name of the APIGroup that contains the resources.  If multiple API groups are specified, any action requested against one of
  // the enumerated resources in any API group will be allowed. "" represents the core API group and "*" represents all API groups.
  // +optional

   *
   *  * If it is a control frame this will result in a single call to [FrameCallback].
   *  * If it is a message frame this will result in a single call to [FrameCallback.onReadMessage].
   *    If the message spans multiple frames, each interleaved control frame will result in a
   *    corresponding call to [FrameCallback].
   */
  @Throws(IOException::class)
  fun processNextFrame() {
    readHeader()
    if (isControlFrame) {

	}

	DB.Model(&User{}).Where("name = ?", user1.Name).Count(&count1).Or("name in ?", []string{user2.Name, user3.Name}).Count(&count2)
	if count1 != 1 || count2 != 3 {
		t.Errorf("multiple count in chain should works")
	}

	tx := DB.Model(&User{}).Where("name = ?", user1.Name).Session(&gorm.Session{})
	tx.Count(&count1)
	tx.Or("name in ?", []string{user2.Name, user3.Name}).Count(&count2)

	}

	cfgName := mux.Vars(r)["name"]
	cfgTarget := madmin.Default
	if cfgName != "" {
		cfgTarget = cfgName
		if idpCfgType == madmin.LDAPIDPCfg && cfgName != madmin.Default {
			// LDAP does not support multiple configurations. So cfgName must be
			// empty or `madmin.Default`.
			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigLDAPNonDefaultConfigName), r.URL)
			return
		}
	}

	}
	msg, err := target.toProducerMessage(eventData)
	if err != nil {
		return err
	}
	_, _, err = target.producer.SendMessage(msg)
	return err
}

// sendMultiple sends multiple messages to the kafka.
func (target *KafkaTarget) sendMultiple(events []event.Event) error {
	if target.producer == nil {
		return store.ErrNotConnected
	}
	var msgs []*sarama.ProducerMessage