{
                    "ctx": {"pattern": "^fixedquery$"},
                    "loc": ["query", "item-query"],
                    "msg": 'string does not match regex "^fixedquery$"',
                    "type": "value_error.str.regex",
                }
            ]
        }
    )


@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

        {
            "detail": [
                {
                    "loc": ["body", "grant_type"],
                    "msg": 'string does not match regex "password"',
                    "type": "value_error.str.regex",
                    "ctx": {"pattern": "password"},
                }
            ]
        }
    )


def test_strict_login_correct_grant_type():

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003.py!}
    ```

## Регулярные выражения

Вы можете определить <abbr title="Регулярное выражение, regex или regexp - это последовательность символов, определяющая шаблон для строк.">регулярное выражение</abbr>, которому должен соответствовать параметр:

=== "Python 3.10+"

    ```Python hl_lines="11"

                {
                    "ctx": {"pattern": "^fixedquery$"},
                    "loc": ["query", "item-query"],
                    "msg": 'string does not match regex "^fixedquery$"',
                    "type": "value_error.str.regex",
                }
            ]
        }
    )


@needs_py310
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

                {
                    "ctx": {"pattern": "^fixedquery$"},
                    "loc": ["query", "item-query"],
                    "msg": 'string does not match regex "^fixedquery$"',
                    "type": "value_error.str.regex",
                }
            ]
        }
    )


@needs_py310
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

## 总结

你可以为查询参数声明额外的校验和元数据。

通用的校验和元数据：

* `alias`
* `title`
* `description`
* `deprecated`

特定于字符串的校验：

* `min_length`
* `max_length`
* `regex`

在这些示例中，你了解了如何声明对 `str` 值的校验。

* `allow_origins` - A list of origins that should be permitted to make cross-origin requests. E.g. `['https://example.org', 'https://www.example.org']`. You can use `['*']` to allow any origin.
* `allow_origin_regex` - A regex string to match against origins that should be permitted to make cross-origin requests. e.g. `'https://.*\.example\.org'`.

        {
            "detail": [
                {
                    "loc": ["body", "grant_type"],
                    "msg": 'string does not match regex "password"',
                    "type": "value_error.str.regex",
                    "ctx": {"pattern": "password"},
                }
            ]
        }
    )


def test_strict_login_correct_correct_grant_type():

## 검증 추가

매개변수 `min_length` 또한 추가할 수 있습니다:

```Python hl_lines="9"
{!../../../docs_src/query_params_str_validations/tutorial003.py!}
```

## 정규식 추가

매개변수와 일치해야 하는 <abbr title="정규표현식(regular expression), regex 또는 regexp는 문자열 조회 패턴을 정의하는 문자들의 순열입니다">정규표현식</abbr>을 정의할 수 있습니다:

```Python hl_lines="10"
{!../../../docs_src/query_params_str_validations/tutorial004.py!}
```

이 특정 정규표현식은 전달 받은 매개변수 값을 검사합니다:

* **Paraméterek** deklarációja különböző helyekről: **header-ök**, **cookie-k**, **form mezők** és **fájlok**.
* Hogyan állíts be **validációs feltételeket** mint a `maximum_length` vagy a `regex`.
* Nagyon hatékony és erős **<abbr title="also known as components, resources, providers, services, injectables">Függőség Injekció</abbr>** rendszerek.