稍后，对于您的产品级别的应用程序，您可能会要使用像**PostgreSQL**这样的数据库服务器。

/// tip

这儿有一个**FastAPI**和**PostgreSQL**的官方项目生成器，全部基于**Docker**，包括前端和更多工具：<a href="https://github.com/tiangolo/full-stack-fastapi-postgresql" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-fastapi-postgresql</a>

///

/// note

请注意，大部分代码是`SQLAlchemy`的标准代码，您可以用于任何框架。FastAPI特定的代码和往常一样少。

///

## ORMs（对象关系映射）

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

### 대안 API 문서

그리고 이제, <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>로 가봅니다.

대안 자동 문서를 볼 수 있습니다 (<a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a> 제공):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

# Templating - `Jinja2Templates`

You can use the `Jinja2Templates` class to render Jinja templates.

Read more about it in the [FastAPI docs for Templates](https://fastapi.tiangolo.com/advanced/templates/).

You can import it directly from `fastapi.templating`:

```python
from fastapi.templating import Jinja2Templates
```

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Alternatieve API-documentatie met <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Gewoon Moderne Python

它具有**合理的默认值**，但你仍然可以使用**环境变量**或配置文件更改和更新所有配置。

它还支持通过一个脚本运行<a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker#pre_start_path" class="external-link" target="_blank">**开始前的先前步骤** </a>。

/// tip

要查看所有配置和选项，请转到 Docker 镜像页面： <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" class="external-link" target="_blank" >tiangolo/uvicorn-gunicorn-fastapi</a>。

///

### 官方 Docker 镜像上的进程数

例えば、`Body`にボディリクエストの`example`を渡すことができます:

```Python hl_lines="21 22 23 24 25 26"
{!../../docs_src/schema_extra_example/tutorial003.py!}
```

## ドキュメントのUIの例

上記のいずれの方法でも、`/docs`の中では以下のようになります:

<img src="https://fastapi.tiangolo.com/img/tutorial/body-fields/image01.png">

## 技術詳細

`example` と `examples`について...

## 🇨🇳

🇨🇳 🌀 🛠️ (`http`, `https`), 🆔 (`myapp.com`, `localhost`, `localhost.tiangolo.com`), & ⛴ (`80`, `443`, `8080`).

, 🌐 👫 🎏 🇨🇳:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

🚥 👫 🌐 `localhost`, 👫 ⚙️ 🎏 🛠️ ⚖️ ⛴,, 👫 🎏 "🇨🇳".

## 🔁

    This is for client errors, invalid authentication, invalid data, etc. Not for server
    errors in your code.

    Read more about it in the
    [FastAPI docs for Handling Errors](https://fastapi.tiangolo.com/tutorial/handling-errors/).

    ## Example

    ```python
    from fastapi import FastAPI, HTTPException

    app = FastAPI()

    items = {"foo": "The Foo Wrestlers"}

client = TestClient(app)


def test_redirect_response_class():
    response = client.get("/fastapi", follow_redirects=False)
    assert response.status_code == 307
    assert response.headers["location"] == "https://fastapi.tiangolo.com"


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

    {
        "name": "items",
        "description": "Manage items. So _fancy_ they have their own docs.",
        "externalDocs": {
            "description": "Items external docs",
            "url": "https://fastapi.tiangolo.com/",
        },
    },
]

app = FastAPI(openapi_tags=tags_metadata)


@app.get("/users/", tags=["users"])
async def get_users():
    return [{"name": "Harry"}, {"name": "Ron"}]