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

경로 매개변수 `item_id`는 `int`가 아닌 `"foo"` 값이기 때문입니다.

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

из-за того, что параметр пути `item_id` имеет значение `"foo"`, которое не является типом  `int`.

	if err == nil {
		t.Fatal("Expected error but found nil")
	}
	if err.Error() != "Bucket not found: bucket1" {
		t.Errorf("%s: Expected the error msg to be `%s`, but instead found `%s`", instanceType, "Bucket not found: bucket1", err.Error())
	}
}

// Wrapper for calling testBucketRecreateFails for both Erasure and FS.
func TestBucketRecreateFails(t *testing.T) {

	}

	aclHeader := r.Header.Get(xhttp.AmzACL)
	if aclHeader == "" {
		acl := &accessControlPolicy{}
		if err = xmlDecoder(r.Body, acl, r.ContentLength); err != nil {
			if terr, ok := err.(*xml.SyntaxError); ok && terr.Msg == io.EOF.Error() {
				writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedXML),
					r.URL)
				return
			}
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}

        }

        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`。