=== "Python 3.9+"

    ```Python hl_lines="10-12"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an_py39.py!}
    ```

=== "Python 3.6+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an.py!}
    ```

=== "Python 3.6+ без Annotated"

    !!! tip "Подсказка"
        Предпочтительнее использовать версию с аннотацией, если это возможно.

=== "Python 3.9+"

    ```Python hl_lines="10-12"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an.py!}
    ```

=== "Python 3.8+ non-Annotated"

    !!! tip
        Prefer to use the `Annotated` version if possible.

=== "Python 3.9+"

    ```Python hl_lines="10-12"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/request_forms_and_files/tutorial001_an.py!}
    ```

=== "Python 3.8+ nicht annotiert"

    !!! tip "Tipp"
        Bevorzugen Sie die `Annotated`-Version, falls möglich.

💯, 👆 💪 ⚙️ 🔗 🔐 📨 👆 *🛃* 💽 🎉 ↩️ 1️⃣ 👈 🔜 ⚙️ 🛎.

👉 🖼 👥 🔜 ✍ 🍕 💽 🕴 💯.

## 📁 📊

👥 ✍ 🆕 📁 `sql_app/tests/test_sql_app.py`.

🆕 📁 📊 👀 💖:

``` hl_lines="9-11"
.
└── sql_app
    ├── __init__.py
    ├── crud.py
    ├── database.py
    ├── main.py
    ├── models.py
    ├── schemas.py
    └── tests
        ├── __init__.py
        └── test_sql_app.py
```

🌐 👈, 🎲 🐦.

### 🔬 📊

🖼, 👥 💪 🔬 `Image` 🏷:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="7-9"

本章只是新添加了测试文件。

正常的依赖项 `get_db()` 返回数据库会话。

测试时使用覆盖依赖项返回自定义数据库会话代替正常的依赖项。

本例中，要创建仅用于测试的临时数据库。

## 文件架构

创建新文件 `sql_app/tests/test_sql_app.py`。

因此，新的文件架构如下：

``` hl_lines="9-11"
.
└── sql_app
    ├── __init__.py
    ├── crud.py
    ├── database.py
    ├── main.py
    ├── models.py
    ├── schemas.py
    └── tests
        ├── __init__.py
        └── test_sql_app.py
```

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

### Das Kindmodell als Typ verwenden

	rf(t, ws, []byte{2, 7})
	sk(t, ws, -4, io.SeekEnd)
	rf(t, ws, []byte{2, 7})
	off := sk(t, ws, 0, io.SeekEnd)
	sk(t, ws, off, io.SeekStart)

	// seek back and overwrite
	sk(t, ws, 1, io.SeekStart)
	wf(t, ws, []byte{9, 11})
	wpex = []byte{1, 9, 11, 8, 9}
	sleq(t, ws.BytesWritten(), wpex)

	// seeks on empty writer.
	ws2 := &WriteSeeker{}
	sk(t, ws2, 0, io.SeekStart)
	sk(t, ws2, 0, io.SeekCurrent)
	sk(t, ws2, 0, io.SeekEnd)

        8             | false             | '2.13.1'            | '-target:8'
        9             | false             | '2.13.1'            | '-target:9'
        11            | false             | '2.13.1'            | '-target:11'
        17            | false             | '2.13.1'            | '-target:17'
        17            | false             | '2.13.2'            | '-target:17'

    {!> ../../../docs_src/body_nested_models/tutorial004_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9-11"
    {!> ../../../docs_src/body_nested_models/tutorial004.py!}
    ```

### Использование вложенной модели в качестве типа