**FastAPI** 將會從請求的**查詢參數**中**提取**出**每個欄位**的資料，並將其提供給你定義的 Pydantic 模型。

## 查看文件

你可以在 `/docs` 頁面的 UI 中查看查詢參數：

<div class="screenshot">
<img src="/img/tutorial/query-param-models/image01.png">
</div>

## 禁止額外的查詢參數

在一些特殊的使用場景中（可能不是很常見），你可能希望**限制**你要收到的查詢參數。

你可以使用 Pydantic 的模型設定來 `forbid`（禁止）任何 `extra`（額外）欄位：

{* ../../docs_src/query_param_models/tutorial002_an_py310.py hl[10] *}

## Универсальная поддержка редактора

И вы получаете поддержку редактора везде.

Даже для элементов внутри списков:

<img src="/img/tutorial/body-nested-models/image01.png">

Вы не могли бы получить такую поддержку редактора, если бы работали напрямую с `dict`, а не с моделями Pydantic.

Isso permitiria que você **reutilizasse o modelo** em **diversos lugares**, e também declarasse validações e metadados de todos os parâmetros de uma única vez. 😎

/// note | Nota

Isso é suportado desde o FastAPI versão `0.115.0`. 🤓

///

## Parâmetros de Consulta com um Modelo Pydantic

OkHttp IDNA Mapping Table
=========================

This module contains supporting tools for building the IDNA mapping table.

 ╭─ <font color="#8AE234"><b>Python module file</b></font> ─╮
 │                      │
 │  🐍 main.py          │
 │                      │
 ╰──────────────────────╯

<font color="#3465A4">INFO    </font> Importing module <font color="#4E9A06">main</font>
<font color="#3465A4">INFO    </font> Found importable FastAPI app

constraints.Length.message = The length of {item} must be between {min} and {max}.
constraints.LuhnCheck.message = The Luhn Modulo 11 checksum of {value} is incorrect.
constraints.Mod10Check.message = The Modulo 10 checksum of {value} is incorrect.
constraints.Mod11Check.message = The Modulo 11 checksum of {value} is incorrect.
constraints.ModCheck.message = The {modType} checksum of {value} is incorrect.

constraints.Length.message = The length of {item} must be between {min} and {max}.
constraints.LuhnCheck.message = The Luhn Modulo 11 checksum of {value} is incorrect.
constraints.Mod10Check.message = The Modulo 10 checksum of {value} is incorrect.
constraints.Mod11Check.message = The Modulo 11 checksum of {value} is incorrect.
constraints.ModCheck.message = The {modType} checksum of {value} is incorrect.

MockWebServer for JUnit 4
=========================

This module integrates mockwebserver3.MockWebServer with JUnit 4.

To use, first add this library as a test dependency:

```
testImplementation("com.squareup.okhttp3:mockwebserver3-junit4:5.1.0")
```

Then in tests annotated `@org.junit.Test`, you may declare a field with the `@Rule` annotation:

```
@Rule public final MockWebServerRule serverRule = new MockWebServerRule();
```

{* ../../docs_src/body/tutorial001.py hl[4] *}

## Crie seu modelo de dados

Então você declara seu modelo de dados como uma classe que herda `BaseModel`.

Utilize os tipos Python padrão para todos os atributos:

{* ../../docs_src/body/tutorial001.py hl[7:11] *}

  id("org.jetbrains.dokka")
  id("com.vanniktech.maven.publish.base")
  id("binary-compatibility-validator")
  id("ru.vyarus.animalsniffer")
}

project.applyOsgi(
  "Export-Package: okhttp3.tls",
  "Automatic-Module-Name: okhttp3.tls",
  "Bundle-SymbolicName: com.squareup.okhttp3.tls"
)

dependencies {
  api(libs.squareup.okio)
  "friendsImplementation"(projects.okhttp)
  compileOnly(libs.animalsniffer.annotations)