## Campos de lista { #list-fields }

Puedes definir un atributo como un subtipo. Por ejemplo, una `list` en Python:

{* ../../docs_src/body_nested_models/tutorial001_py310.py hl[12] *}

Esto hará que `tags` sea una lista, aunque no declare el tipo de los elementos de la lista.

## Campos de lista con parámetro de tipo { #list-fields-with-type-parameter }

              @SuppressWarnings("ThreadPriorityCheck") // doing our best to test for races
              protected Schedule getNextSchedule() throws Exception {
                // Explicitly yield to increase the probability of a pathological scheduling.
                Thread.yield();
                return new Schedule(0, SECONDS);
              }
            };
          }
        };
    service.useBarriers = false;

              @SuppressWarnings("ThreadPriorityCheck") // doing our best to test for races
              protected Schedule getNextSchedule() throws Exception {
                // Explicitly yield to increase the probability of a pathological scheduling.
                Thread.yield();
                return new Schedule(0, SECONDS);
              }
            };
          }
        };
    service.useBarriers = false;

		<fieldset class="mb-3">
			<legend><la:message key="labels.index_label" /></legend>
			<label for="labelTypeSearchOption"><la:message
					key="labels.index_label" /></label>
			<la:select property="fields.label" styleId="labelTypeSearchOption"
				multiple="true" styleClass="form-control">
				<c:forEach var="item" items="${labelTypeItems}">
					<la:option value="${f:u(item.value)}">${f:h(item.label)}</la:option>
				</c:forEach>

                                    </la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered" aria-label="<la:message key="labels.duplicate_host_details" />">
                                    <tbody>
                                    <tr>

		<fieldset class="mb-3">
			<legend><la:message key="labels.index_label" /></legend>
			<label for="labelTypeSearchOption"><la:message
					key="labels.index_label" /></label>
			<la:select property="fields.label" styleId="labelTypeSearchOption"
				multiple="true" styleClass="form-control">
				<c:forEach var="item" items="${labelTypeItems}">
					<la:option value="${f:u(item.value)}">${f:h(item.label)}</la:option>
				</c:forEach>

## 檢視文件 { #check-the-docs }

你可以在 `/docs` 的文件 UI 中驗證：

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## 禁止額外的表單欄位 { #forbid-extra-form-fields }

在某些特殊情況（可能不常見）下，你可能希望僅允許 Pydantic 模型中宣告的表單欄位，並禁止任何額外欄位。

/// note | 注意

此功能自 FastAPI 版本 `0.114.0` 起支援。🤓

///

你可以使用 Pydantic 的模型設定來 `forbid` 任何 `extra` 欄位：

Form gövdelerini tanımlamak için `Form`'u açıkça kullanmanız gerekir; çünkü bunu yapmazsanız parametreler query parametreleri veya body (JSON) parametreleri olarak yorumlanır.

///

## "Form Alanları" Hakkında { #about-form-fields }

HTML formlarının (`<form></form>`) verileri sunucuya gönderme şekli normalde bu veri için JSON'dan farklı "özel" bir encoding kullanır.

**FastAPI** bu veriyi JSON yerine doğru yerden okuyacaktır.

    listener.shouldClose = true
    // Large headers are a likely reason the servers would cut off the connection before it completes sending
    // request headers.
    // 431 "Request Header Fields Too Large"
    val largeHeaders =
      Headers
        .Builder()
        .apply {
          repeat(32) {
            add("name-$it", "value-$it-" + "0".repeat(1024))
          }
        }.build()

                                    </la:info>
                                    <la:errors/>
                                </div>
                                    <%-- Form Fields --%>
                                <table class="table table-bordered" aria-label="<la:message key="labels.pathmap_details" />">
                                    <tbody>
                                    <tr>