* <dfn title="преобразование строки, полученной из HTTP-запроса в данные Python">"Парсинг"</dfn> данных
* Проверка на соответствие данных (Валидация)
* Автоматическая документация

## Значения по умолчанию { #defaults }

Поскольку query-параметры не являются фиксированной частью пути, они могут быть не обязательными и иметь значения по умолчанию.

В примере выше значения по умолчанию равны `skip=0` и `limit=10`.

- `description`：API 的描述，可包含 Markdown，并会展示在文档中。
- `routes`：路由列表，即已注册的每个路径操作。来自 `app.routes`。

/// info | 信息

参数 `summary` 仅在 OpenAPI 3.1.0 及更高版本中可用，FastAPI 0.99.0 及以上版本支持。

///

## 覆盖默认值 { #overriding-the-defaults }

基于以上信息，你可以用同一个工具函数生成 OpenAPI 架构，并按需覆盖其中的各个部分。

例如，让我们添加 [ReDoc 的 OpenAPI 扩展以包含自定义 Logo](https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo)。

### 常规 **FastAPI** { #normal-fastapi }

options - Your custom options to override the ones defined in [Defaults](#defaults)\n   * @return {Object} instance - The generated Popper.js instance\n   */\n  constructor(reference, popper, options = {}) {\n    // make update() debounced, so that it only runs at most once-per-tick\n    this.update = debounce(this.update.bind(this));\n\n    // with {} we create a new object with the options inside it\n    this.options = { ...Popper.Defaults, ...options };\n\n    // init state\n    this.state = {\n ...

因為它們是 URL 的一部分，天生是字串。

但當你以 Python 型別宣告它們（如上例中的 `int`），它們會被轉換成該型別並據此驗證。

對於查詢參數，會套用與路徑參數相同的處理流程：

* 編輯器支援（當然）
* 資料 <dfn title="將來自 HTTP 請求的字串轉換為 Python 資料">「解析」</dfn>
* 資料驗證
* 自動文件

## 預設值 { #defaults }

由於查詢參數不是路徑的固定部分，因此可以是選填並具有預設值。

在上面的例子中，預設值為 `skip=0` 與 `limit=10`。

因此，造訪下列 URL：

```
http://127.0.0.1:8000/items/
```

等同於造訪：

```
http://127.0.0.1:8000/items/?skip=0&limit=10

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-17T20-53-08Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-20T18-32-01Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-20T18-32-01Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-20T18-32-01Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-20T18-32-01Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: minio/minio tag: RELEASE.2021-08-20T18-32-01Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: minio/mc tag: RELEASE.2021-07-27T06-46-19Z pullPolicy:...