之後只要輸出該資料，即使來源有重覆，也會以唯一元素的 `set` 輸出。

並且也會在註解／文件中相應標示。

## 巢狀模型 { #nested-models }

每個 Pydantic 模型的屬性都有型別。

而該型別本身也可以是另一個 Pydantic 模型。

因此，你可以宣告具有特定屬性名稱、型別與驗證的深度巢狀 JSON「物件」。

而且可以任意深度巢狀。

### 定義子模型 { #define-a-submodel }

例如，我們可以定義一個 `Image` 模型：

{* ../../docs_src/body_nested_models/tutorial004_py310.py hl[7:9] *}

### 將子模型作為型別使用 { #use-the-submodel-as-a-type }

然後把它作為某個屬性的型別使用：

```

因為上傳的檔案是以「表單資料」送出的。

///

## 匯入 `File` { #import-file }

從 `fastapi` 匯入 `File` 與 `UploadFile`：

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[3] *}

## 定義 `File` 參數 { #define-file-parameters }

和 `Body` 或 `Form` 一樣的方式建立檔案參數：

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

/// info

`File` 是直接繼承自 `Form` 的類別。

Але цей тип сам може бути іншою моделлю Pydantic.

Отже, ви можете оголосити глибоко вкладені JSON «об'єкти» з конкретними іменами атрибутів, типами та перевірками.

Усе це, вкладене без обмежень.

### Визначення підмоделі { #define-a-submodel }

Наприклад, ми можемо визначити модель `Image`:

{* ../../docs_src/body_nested_models/tutorial004_py310.py hl[7:9] *}

### Використання підмоделі як типу { #use-the-submodel-as-a-type }

	xioutil "github.com/minio/minio/internal/ioutil"
)

func defaultFilenameFunc() string {
	return fmt.Sprintf("minio-%s.log", fmt.Sprintf("%X", time.Now().UTC().UnixNano()))
}

// Options define configuration options for Writer
type Options struct {
	// Directory defines the directory where log files will be written to.
	// If the directory does not exist, it will be created.
	Directory string

"Recipient" means anyone who receives the Program under this Agreement
or any Secondary License (as applicable), including Contributors.

"Derivative Works" shall mean any work, whether in Source Code or other
form, that is based on (or derived from) the Program and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship.

      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes

        @DisplayName("getDomainName and getAccountName behaviors for unknown, domain, and user")
        void testNamesByType() {
            byte[] ident = new byte[] { 0, 0, 0, 0, 0, 5 };
            // Unknown: domainName derived from numeric SID, accountName = RID
            SID unknown = new SID(buildSidT((byte) 1, ident, 10, 20, 30), jcifs.SID.SID_TYPE_UNKNOWN, null, null, false);
            assertEquals("S-1-5-10-20", unknown.getDomainName());

      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes

      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes

      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes