* ⚫️ 📣 📦 `last_query` 🍪, `str`.
    * 🚥 👩‍💻 🚫 🚚 🙆 🔢 `q`, 👥 ⚙️ 🏁 🔢 ⚙️, ❔ 👥 🖊 🍪 ⏭.

## ⚙️ 🔗

⤴️ 👥 💪 ⚙️ 🔗 ⏮️:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="22"
    {!> ../../../docs_src/dependencies/tutorial005.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="19"
    {!> ../../../docs_src/dependencies/tutorial005_py310.py!}
    ```

!!! info

That way, we can declare just the differences between the models (with plaintext `password`, with `hashed_password` and without password):

=== "Python 3.10+"

    ```Python hl_lines="7  13-14  17-18  21-22"
    {!> ../../../docs_src/extra_models/tutorial002_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="9  15-16  19-20  23-24"
    {!> ../../../docs_src/extra_models/tutorial002.py!}
    ```

## 🗄 & ⚒ 🆙 `SQLAlchemy`

* 🗄 `SQLAlchemy`.
* ✍ `metadata` 🎚.
* ✍ 🏓 `notes` ⚙️ `metadata` 🎚.

```Python hl_lines="4  14  16-22"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

!!! tip
    👀 👈 🌐 👉 📟 😁 🇸🇲 🐚.

    `databases` 🚫 🔨 🕳 📥.

## 🗄 & ⚒ 🆙 `databases`

* 🗄 `databases`.

## 导入与设置 `SQLAlchemy`

* 导入 `SQLAlchemy`
* 创建 `metadata` 对象
* 使用 `metadata` 对象创建 `notes` 表

```Python hl_lines="4  14  16-22"
{!../../../docs_src/async_sql_databases/tutorial001.py!}
```

!!! tip "提示"

    注意，上例是都是纯 SQLAlchemy Core 代码。

    `databases` 还没有进行任何操作。

## 导入并设置 `databases`

* 导入 `databases`

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2
}
```

하지만, 다중 본문 매개변수 역시 선언할 수 있습니다. 예. `item`과 `user`:

```Python hl_lines="22"
{!../../../docs_src/body_multiple_params/tutorial002.py!}
```

이 경우에, **FastAPI**는 이 함수 안에 한 개 이상의 본문 매개변수(Pydantic 모델인 두 매개변수)가 있다고 알 것입니다.

그래서, 본문의 매개변수 이름을 키(필드 명)로 사용할 수 있고, 다음과 같은 본문을 예측합니다:

```JSON
{

### ✍ 🛠️

🛠️ 👥 🔜 🚮 (🔢) 🔜 ✍ 🆕 🇸🇲 `SessionLocal` 🔠 📨, 🚮 ⚫️ 📨 & ⤴️ 🔐 ⚫️ 🕐 📨 🏁.

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="14-22"
    {!> ../../../docs_src/sql_databases/sql_app/alt_main.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="12-20"
    {!> ../../../docs_src/sql_databases/sql_app_py39/alt_main.py!}
    ```

* `value`: O próprio exemplo mostrado, ex: um `dict`.
* `externalValue`: alternativa ao `value`, uma URL apontando para o exemplo. Embora isso possa não ser suportado por tantas ferramentas quanto `value`.

```Python hl_lines="22-48"
{!../../../docs_src/schema_extra_example/tutorial004.py!}
```

### Exemplos na UI da documentação

Com `examples` adicionado a `Body()`, os `/docs` vão ficar assim:

And if you see the resulting OpenAPI (at `/openapi.json` in your API), you will see your extension as part of the specific *path operation* too:

```JSON hl_lines="22"
{
    "openapi": "3.1.0",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {

Und wenn Sie die resultierende OpenAPI sehen (unter `/openapi.json` in Ihrer API), sehen Sie Ihre Erweiterung auch als Teil der spezifischen *Pfadoperation*:

```JSON hl_lines="22"
{
    "openapi": "3.1.0",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {

<img src="/img/tutorial/path-operation-advanced-configuration/image01.png">

Et dans le fichier openapi généré (`/openapi.json`), vous verrez également votre extension dans le cadre du *chemin* spécifique :

```JSON hl_lines="22"
{
    "openapi": "3.0.2",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "summary": "Read Items",