///

**FastAPI** tamamen Pydantic'e dayanmaktadır.

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

##  **FastAPI** tip belirteçleri

**FastAPI** birkaç şey yapmak için bu tür tip belirteçlerinden faydalanır.

- [v1.3.0-beta.3](CHANGELOG.md#v130-beta3)
- [v1.3.0-beta.2](CHANGELOG.md#v130-beta2)
- [v1.3.0-beta.1](CHANGELOG.md#v130-beta1)
- [v1.3.0-alpha.5](CHANGELOG.md#v130-alpha5)
- [v1.3.0-alpha.4](CHANGELOG.md#v130-alpha4)
- [v1.3.0-alpha.3](CHANGELOG.md#v130-alpha3)
- [v1.3.0-alpha.2](CHANGELOG.md#v130-alpha2)
- [v1.3.0-alpha.1](CHANGELOG.md#v130-alpha1)



# v1.3.0-beta.3

///

**FastAPI** is all based on Pydantic.

You will see a lot more of all this in practice in the [Tutorial - User Guide](tutorial/index.md){.internal-link target=_blank}.

/// tip

/// danger

Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

If you don't know, you will learn what a "password hash" is in the [security chapters](security/simple-oauth2.md#password-hashing){.internal-link target=_blank}.

///

## Multiple models { #multiple-models }

Here's a general idea of how the models could look like with their password fields and the places where they are used:

{* ../../docs_src/first_steps/tutorial003_py39.py hl[7] *}

/// note | Nota

Se você não sabe a diferença, verifique o [Async: *"Com pressa?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Passo 5: retorne o conteúdo { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py39.py hl[8] *}

{* ../../docs_src/first_steps/tutorial003_py39.py hl[7] *}

/// note | Nota

Si no sabes la diferencia, Revisa la sección [Async: *"¿Tienes prisa?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Paso 5: retorna el contenido { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001_py39.py hl[8] *}

///

**FastAPI** basiert vollständig auf Pydantic.

Viel mehr von all dem werden Sie in praktischer Anwendung im [Tutorial – Benutzerhandbuch](tutorial/index.md){.internal-link target=_blank} sehen.

/// tip | Tipp

是否使用冒号 `:` 等符号，或是不是 URL 并不重要。

这些细节只是特定的实现方式。

对 OAuth2 来说，它们都只是字符串而已。

///

## 全局纵览

首先，快速浏览一下以下代码与**用户指南**中 [OAuth2 实现密码哈希与 Bearer  JWT 令牌验证](../../tutorial/security/oauth2-jwt.md){.internal-link target=_blank}一章中代码的区别。以下代码使用 OAuth2 作用域：

{* ../../docs_src/security/tutorial005.py hl[2,4,8,12,46,64,105,107:115,121:124,128:134,139,153] *}

下面，我们逐步说明修改的代码内容。

## OAuth2 安全方案

/// info

To use `EmailStr`, first install <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install email-validator
```

or with:

```console
$ pip install "pydantic[email]"
```

///

Para usar `EmailStr`, primeiro instale <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Certifique-se de criar um [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, ative-o e instale-o, por exemplo:

```console
$ pip install email-validator
```

ou com:

```console
$ pip install "pydantic[email]"
```

///