```

ここで、クエリパラメータ `needy` は `str` 型の必須のクエリパラメータです

以下のURLをブラウザで開くと:

```
http://127.0.0.1:8000/items/foo-item
```

...必須のパラメータ `needy` を加えなかったので、以下の様なエラーが表示されます:

```JSON
{
    "detail": [
        {
            "loc": [
                "query",
                "needy"
            ],
            "msg": "field required",
            "type": "value_error.missing"
        }
    ]
}

import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.NoSuchElementException;
import javax.annotation.CheckForNull;

/**
 * Implementation detail for the internal structure of {@link Range} instances. Represents a unique
 * way of "cutting" a "number line" (actually of instances of type {@code C}, not necessarily

Minute(!0),this.second=a-60):this.second=a},mousewheel:function(b){if(!this.disableMousewheel){b.preventDefault(),b.stopPropagation();var c=b.originalEvent.wheelDelta||-b.originalEvent.detail,d=null;switch("mousewheel"===b.type?d=-1*b.originalEvent.wheelDelta:"DOMMouseScroll"===b.type&&(d=40*b.originalEvent.detail),d&&(b.preventDefault(),a(this).scrollTop(d+a(this).scrollTop())),this.highlightedUnit){case"minute":c>0?this.incrementMinute():this.decrementMinute(),this.highlightMinute();break;case...

Gradle uses pull requests for contributions. Fork [gradle/gradle](https://github.com/gradle/gradle) and clone your fork. Configure your Git username and email with:

    git config user.name 'First Last'
    git config user.email ******@****.***

#### Import Gradle into IntelliJ

To import Gradle into IntelliJ:
- Open the `build.gradle.kts` file in root of the project with IntelliJ and choose "Open as Project"

///

## 数据校验

通过浏览器访问 <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>，接收如下 HTTP 错误信息：

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]

 [bom]: https://docs.gradle.org/6.2/userguide/platforms.html#sub:bom_import
 [bouncy_castle_releases]: https://www.bouncycastle.org/releasenotes.html
 [CVE-2021-0341]: https://nvd.nist.gov/vuln/detail/CVE-2021-0341
 [CVE-2022-24329]: https://nvd.nist.gov/vuln/detail/CVE-2022-24329
 [dev_server]: https://github.com/square/okhttp/blob/482f88300f78c3419b04379fc26c3683c10d6a9d/samples/guide/src/main/java/okhttp3/recipes/kt/DevServer.kt

///

## Validation de données

Si vous allez sur <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>, vous aurez une belle erreur HTTP :

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]

## Validação de dados

Mas se você abrir o seu navegador em <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>, você verá um belo erro HTTP:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]

labels.failure_url_link_list	=	Liste
labels.failure_url_link_details	=	Détails
labels.failure_url_link_delete	=	Supprimer
labels.failure_url_delete_all_link	=	Supprimer
labels.failure_url_delete_all_confirmation	=	Vous voulez vraiment supprimer tout ?
labels.failure_url_delete_all_cancel	=	Annuler
labels.failure_url_error_count	=	Nombre d'erreurs
labels.failure_url_title_details	=	Détail des Urls qui ne répondent pas
labels.failure_url_id	=	ID

{!../../docs_src/bigger_applications/app/main.py!}
```

and it will work correctly, together with all the other *path operations* added with `app.include_router()`.

/// info | "Very Technical Details"

**Note**: this is a very technical detail that you probably can **just skip**.

---

The `APIRouter`s are not "mounted", they are not isolated from the rest of the application.