"input": "foo"
    }
  ]
}
```

because the path parameter `item_id` had a value of `"foo"`, which is not an `int`.

The same error would appear if you provided a `float` instead of an `int`, as in: [http://127.0.0.1:8000/items/4.2](http://127.0.0.1:8000/items/4.2)

/// check

So, with the same Python type declaration, **FastAPI** gives you data validation.

      ],
      "msg": "Input should be a valid integer, unable to parse string as an integer",
      "input": "foo"
    }
  ]
}
```

因為路徑參數 `item_id` 的值是 `"foo"`，它不是 `int`。

同樣的錯誤也會在你提供 `float` 而不是 `int` 時出現，例如：[http://127.0.0.1:8000/items/4.2](http://127.0.0.1:8000/items/4.2)

/// check

因此，搭配相同的 Python 型別宣告，**FastAPI** 會為你進行資料驗證。

注意錯誤也清楚指出驗證未通過的確切位置。

這在開發與除錯與你的 API 互動的程式碼時非常有幫助。

///

                </div>
            </la:form>

        </section>
    </main>
    <jsp:include page="/WEB-INF/view/common/admin/footer.jsp"></jsp:include>
</div>
<jsp:include page="/WEB-INF/view/common/admin/foot.jsp"></jsp:include>
</body>

                </div>
            </la:form>
        </section>
    </main>
    <jsp:include page="/WEB-INF/view/common/admin/footer.jsp"></jsp:include>
</div>
<jsp:include page="/WEB-INF/view/common/admin/foot.jsp"></jsp:include>
</body>

{* ../../docs_src/request_forms/tutorial001_an_py310.py hl[9] *}

Zum Beispiel stellt eine der Möglichkeiten, die OAuth2-Spezifikation zu verwenden (genannt „password flow“), die Bedingung, einen `username` und ein `password` als Formularfelder zu senden.

# | INTEGER       | java.lang.Integer    | int?          |
# | BIGINT        | java.lang.Long       | long?         |
# | REAL          | java.math.BigDecimal | decimal?      |
# | FLOAT         | java.math.BigDecimal | decimal?      |
# | DOUBLE        | java.math.BigDecimal | decimal?      |
# | DATE          | java.util.Date       | DateTime?     |
# | TIME          | java.sql.Time        | DateTime?     |

                </div>
            </la:form>
        </section>
    </main>
    <jsp:include page="/WEB-INF/view/common/admin/footer.jsp"></jsp:include>
</div>
<jsp:include page="/WEB-INF/view/common/admin/foot.jsp"></jsp:include>
</body>

        ComponentUtil.register(queryProcessor, "queryProcessor");

        queryCommand = new QueryCommand() {
            @Override
            public QueryBuilder execute(QueryContext context, Query query, float boost) {
                return null;
            }

            @Override
            protected String getQueryClassName() {
                return null;
            }
        };
    }

# Keep-alive comment, per the SSE spec recommendation
KEEPALIVE_COMMENT = b": ping\n\n"

# Seconds between keep-alive pings when a generator is idle.
# Private but importable so tests can monkeypatch it.

			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         RedirectURI,
			Description: `[DEPRECATED use env 'MINIO_BROWSER_REDIRECT_URL'] Configure custom redirect_uri for OpenID login flow callback` + defaultHelpPostfix(RedirectURI),
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         config.Comment,
			Description: config.DefaultComment,
			Optional:    true,