# Advanced User Guide { #advanced-user-guide }

## Additional Features { #additional-features }

The main [Tutorial - User Guide](../tutorial/index.md){.internal-link target=_blank} should be enough to give you a tour through all the main features of **FastAPI**.

In the next sections you will see other options, configurations, and additional features.

/// tip

The next sections are **not necessarily "advanced"**.

# 高级安全

## 附加特性

除 [教程 - 用户指南: 安全性](../../tutorial/security/index.md){.internal-link target=_blank} 中涵盖的功能之外，还有一些额外的功能来处理安全性.

/// tip | 小贴士

接下来的章节 **并不一定是 "高级的"**.

而且对于你的使用场景来说，解决方案很可能就在其中。

///

## 先阅读教程

接下来的部分假设你已经阅读了主要的 [教程 - 用户指南: 安全性](../../tutorial/security/index.md){.internal-link target=_blank}.

## Вывод { #conclusion }

Благодаря этому вы должны иметь базовое представление о том, что такое **переменные окружения** и как использовать их в Python.

Подробнее о них вы также можете прочитать в <a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">статье о переменных окружения на википедии</a>.

/// info

Daha fazla şey öğrenmek için <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic'i takip edin</a>.

///

**FastAPI** tamamen Pydantic'e dayanmaktadır.

Daha fazlasini görmek için [Tutorial - User Guide](tutorial/index.md){.internal-link target=_blank}.

##  **FastAPI** tip belirteçleri

And open the docs at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

You will see the automatic API docs for the main app, including only its own _path operations_:

<img src="/img/tutorial/sub-applications/image01.png">

And then, open the docs for the sub-application, at <a href="http://127.0.0.1:8000/subapi/docs" class="external-link" target="_blank">http://127.0.0.1:8000/subapi/docs</a>.

Starlette (and **FastAPI**) are based on <a href="https://anyio.readthedocs.io/en/stable/" class="external-link" target="_blank">AnyIO</a>, which makes it compatible with both Python's standard library <a href="https://docs.python.org/3/library/asyncio-task.html" class="external-link" target="_blank">asyncio</a> and <a href="https://trio.readthedocs.io/en/stable/" class="external-link" target="_blank">Trio</a>.

Here we'll see an example using <a href="https://sqlmodel.tiangolo.com/" class="external-link" target="_blank">SQLModel</a>.

**SQLModel** is built on top of <a href="https://www.sqlalchemy.org/" class="external-link" target="_blank">SQLAlchemy</a> and Pydantic. It was made by the same author of **FastAPI** to be the perfect match for FastAPI applications that need to use **SQL databases**.

Hier werden wir ein Beispiel mit <a href="https://sqlmodel.tiangolo.com/" class="external-link" target="_blank">SQLModel</a> sehen.

By default, **FastAPI** would automatically convert that return value to JSON using the `jsonable_encoder` explained in [JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.

Then, behind the scenes, it would put that JSON-compatible data (e.g. a `dict`) inside of a `JSONResponse` that would be used to send the response to the client.

По указанным причинам текущие версии до сих пор `0.x.x`. Это говорит о том, что каждая версия может содержать обратно несовместимые изменения, следуя <a href="https://semver.org/" class="external-link" target="_blank">Семантическому версионированию</a>.