```http
https://example.com/items/?limit=10&tool=plumbus
```

クエリパラメータ `tool` が許可されていないことを通知する**エラー**レスポンスが返されます。

```json
{
    "detail": [
        {
            "type": "extra_forbidden",
            "loc": ["query", "tool"],
            "msg": "Extra inputs are not permitted",
            "input": "plumbus"
        }
    ]
}
```

## まとめ

**FastAPI**では、**クエリパラメータ**を宣言するために、**Pydanticモデル**を使用できます。😎

```JSON
{
  "detail": [
    {
      "type": "int_parsing",
      "loc": [
        "path",
        "item_id"
      ],
      "msg": "Input should be a valid integer, unable to parse string as an integer",
      "input": "foo"
    }
  ]
}
```

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

...without adding the required parameter `needy`, you will see an error like:

```JSON
{
  "detail": [
    {
      "type": "missing",
      "loc": [
        "query",
        "needy"
      ],
      "msg": "Field required",
      "input": null
    }
  ]
}
```

As `needy` is a required parameter, you would need to set it in the URL:

この例外ハンドラは`Requset`と例外を受け取ります。

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14,15,16] *}

これで、`/items/foo`にアクセスすると、デフォルトのJSONエラーの代わりに以下が返されます:

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

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

                return false;
            }

            @Override
            public void reset() {
            }

            @Override
            public void setLocale(java.util.Locale loc) {
            }

            @Override
            public java.util.Locale getLocale() {
                return null;
            }
        };

          key: ${{ runner.os }}-go-${{ matrix.go }}-${{ hashFiles('tests/go.mod') }}

      - name: Tests
        run: GITHUB_ACTION=true GORM_DIALECT=tidb GORM_DSN="root:@tcp(localhost:9940)/test?charset=utf8&parseTime=True&loc=Local" ./tests/tests_all.sh

  gaussdb:
    strategy:
      matrix:
        dbversion: ['opengauss/opengauss:7.0.0-RC1.B023']
        go: ['1.23', '1.24']

        public boolean isCommitted() {
            return false;
        }

        @Override
        public void reset() {
        }

        @Override
        public void setLocale(java.util.Locale loc) {
        }

        @Override
        public java.util.Locale getLocale() {
            return java.util.Locale.getDefault();
        }
    }

하지만 브라우저에서 <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>로 이동하면, HTTP 오류가 잘 뜨는 것을 확인할 수 있습니다:

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

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

...sans ajouter le paramètre requis `needy`, vous aurez une erreur :

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