q: Union[str, None] = None
```

Или в Python 3.10 и выше:

```Python
q: str | None = None
```

Например:

{* ../../docs_src/body_multiple_params/tutorial004_an_py310.py hl[27] *}

/// info | Информация

`Body` также имеет все те же дополнительные параметры валидации и метаданных, как у `Query`,`Path` и других, которые вы увидите позже.

///

## Добавление одного body-параметра

                insertList.forEach(this::writeSearchLogEvent);
                updateList.forEach(this::writeSearchLogEvent);
            }
            // insert/update user info
            userInfoBhv.batchInsert(insertList);
            userInfoBhv.batchUpdate(updateList);
            // update search log
            searchLogList.stream().forEach(searchLog -> {

### Запуск приложения

Вы можете запустить приложение следующим образом:

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

	"fmt"
	"sort"
	"strings"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
)

type result struct {
	Result       sql.Result
	RowsAffected int64
}

func (info *result) ModifyStatement(stmt *Statement) {
	stmt.Result = info
}

// Build implements clause.Expression interface
func (result) Build(clause.Builder) {
}

func WithResult() *result {
	return &result{}
}

  integrity sha512-wy0mglZpDSiSS0XHrVR+BAdId2+yxPSoJW8fsna3ZpYSlufjvxnP4YbKTCBZnNIcGN4r6ZPXV55X4mYExOfLmw==

"@webpack-cli/info@^2.0.1":
  version "2.0.2"
  resolved "https://registry.yarnpkg.com/@webpack-cli/info/-/info-2.0.2.tgz#cc3fbf22efeb88ff62310cf885c5b09f44ae0fdd"
  integrity sha512-zLHQdI/Qs1UyT5UBdWNqsARasIA+AaF8t+4u2aS2nEpBQh2mWIVb8qAklq0eUENnC5mOItrIB4LiS9xMtph18A==

                        logger.info("Cpu Load {}% is greater than {}%. {} waiting thread(s). {} thread is timed out.", current, percent,
                                waitingThreadNames.size(), threadName);
                    }
                    return false;
                }
                if (logger.isInfoEnabled()) {

	return "Uname", nil
}

func (f *fileInfoNames) Gname() (string, error) {
	return "Gname", nil
}

func TestFileInfoHeaderUseFileInfoNames(t *testing.T) {
	info := &fileInfoNames{}
	header, err := FileInfoHeader(info, "")
	if err != nil {
		t.Fatal(err)
	}
	if header.Uname != "Uname" {
		t.Fatalf("header.Uname: got %s, want %s", header.Uname, "Uname")
	}
	if header.Gname != "Gname" {

func (tw *Writer) AddFS(fsys fs.FS) error {
	return fs.WalkDir(fsys, ".", func(name string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		}
		if name == "." {
			return nil
		}
		info, err := d.Info()
		if err != nil {
			return err
		}
		linkTarget := ""
		if typ := d.Type(); typ == fs.ModeSymlink {
			var err error
			linkTarget, err = fs.ReadLink(fsys, name)
			if err != nil {

Es wird bereits mit FastAPI installiert sein.

```Python hl_lines="3-4"
{!> ../../docs_src/query_params_str_validations/tutorial002_an.py!}
```

////

/// info

FastAPI unterstützt (und empfiehlt die Verwendung von) `Annotated` seit Version 0.95.0.

Wenn Sie eine ältere Version haben, werden Sie Fehler angezeigt bekommen, wenn Sie versuchen, `Annotated` zu verwenden.

        Issuer: CN = consoleAdmin
        Validity
            Not Before: Jul 19 15:08:44 2021 GMT
            Not After : Aug 18 15:08:44 2021 GMT
        Subject: CN = consoleAdmin
        Subject Public Key Info:
            Public Key Algorithm: ED25519
                ED25519 Public-Key:
                pub:
                    5a:91:87:b8:77:fe:d4:af:d9:c7:c7:ce:55:ae:74: