}

        String msg = summary.getMessage();

        if (referenceKey != null && !referenceKey.isEmpty()) {
            if (msg.indexOf('\n') < 0) {
                msg += " -> " + MessageUtils.builder().strong(referenceKey);
            } else {
                msg += "\n-> " + MessageUtils.builder().strong(referenceKey);
            }
        }

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"
        }
    ]
}
```

以下のようなテキスト版を取得します:

```
1 validation error
path -> item_id

        KRB5 OID: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5)
        krb5_tok_id: KRB5_AP_REQ (0x0001)
        Kerberos
            ap-req
                pvno: 5
                msg-type: krb-ap-req (14)
                Padding: 0
                ap-options: 20000000
                ticket
                    tkt-vno: 5
                    realm: W2K19SINGLE.SPRINGFIELD
                    sname

```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",
      "url": "https://errors.pydantic.dev/2.1/v/int_parsing"
    }
  ]
}
```

```

...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"
        }
    ]
}
```

`needy` は必須のパラメータなので、URLにセットする必要があります:

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

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

这是因为路径参数 `item_id` 的值 （`"foo"`）的类型不是 `int`。

```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",
      "url": "https://errors.pydantic.dev/2.1/v/int_parsing"
    }
  ]
}
```

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

debido a que el parámetro de path `item_id` tenía el valor `"foo"`, que no es un `int`.

		localHost, err := isLocalHost(host.Name, host.Port.String(), host.Port.String())
		if err != nil {
			return err
		}
		if !localHost {
			return config.ErrInvalidAddressFlag(nil).Msg("host in server address should be this server")
		}
	}

	return nil

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

car le paramètre de chemin `item_id` possède comme valeur `"foo"`, qui ne peut pas être convertie en entier (`int`).