带有可选路径参数的反应路由器 [英] React Router with optional path parameter

问题描述

我想声明一个带有可选路径参数的路径，因此当我添加它时，页面会做一些额外的事情(例如填充一些数据):

I want to declare a path with an optional path parameter, hence when I add it the page to do something extra (e.g. fill some data):

http://localhost/app/path/to/page <= 渲染页http://localhost/app/path/to/page/pathParam <= 渲染页面与根据pathParam的一些数据

http://localhost/app/path/to/page <= render the page http://localhost/app/path/to/page/pathParam <= render the page with some data according to the pathParam

在我的反应路由器中，我有以下路径，以支持这两个选项(这是一个简化的示例):

In my react router I have the following paths, in order to support the two options (this is a simplified example):

<Router history={history}>    
   <Route path="/path" component={IndexPage}>
      <Route path="to/page" component={MyPage}/>
      <Route path="to/page/:pathParam" component={MyPage}/>
   </Route>    
</Router>

我的问题是，我们可以在 one 路线中声明它吗?如果我只添加第二行，则找不到没有参数的路由.

My question is, can we declare it in one route? If I add only the second row then the route without the parameter is not found.

编辑#1:

here 提到的解决方案对以下语法不起作用，是不是合适的吗?它存在于文档中吗?

The solution mentioned here about the following syntax did not work for me, is it a proper one? Does it exist in the documentation?

<Route path="/product/:productName/?:urlID?" handler={SomeHandler} />

我的 react-router 版本是:1.0.3

My react-router version is: 1.0.3

推荐答案

您发布的编辑对旧版本的 React-router (v0.13) 有效，不再适用.

The edit you posted was valid for an older version of React-router (v0.13) and doesn't work anymore.

从 1.0.0 版本开始，您可以使用以下方式定义可选参数:

Since version 1.0.0 you define optional parameters with:

<Route path="to/page(/:pathParam)" component={MyPage} />

对于多个可选参数:

<Route path="to/page(/:pathParam1)(/:pathParam2)" component={MyPage} />

您使用括号 ( ) 包裹路由的可选部分，包括前导斜杠 (/).查看 路由匹配指南 官方文档页面.

You use parenthesis ( ) to wrap the optional parts of route, including the leading slash (/). Check out the Route Matching Guide page of the official documentation.

注意: :paramName 参数匹配一个 URL 段直到下一个 /，? 或 #.有关路径和参数的详细信息，在此处阅读更多信息.

Note: The :paramName parameter matches a URL segment up to the next /, ?, or #. For more about paths and params specifically, read more here.

React Router v4 与 v1-v3 根本不同，可选的路径参数没有在 中明确定义官方文档.

React Router v4 is fundamentally different than v1-v3, and optional path parameters aren't explicitly defined in the official documentation either.

相反，系统会指示您定义 的 path 参数path-to-regexp 理解.这为定义路径提供了更大的灵活性，例如重复模式、通配符等.因此，要将参数定义为可选参数，请添加尾随问号 (?).

Instead, you are instructed to define a path parameter that path-to-regexp understands. This allows for much greater flexibility in defining your paths, such as repeating patterns, wildcards, etc. So to define a parameter as optional you add a trailing question-mark (?).

因此，要定义可选参数，您可以:

As such, to define an optional parameter, you do:

<Route path="/to/page/:pathParam?" component={MyPage} />

对于多个可选参数:

<Route path="/to/page/:pathParam1?/:pathParam2?" component={MyPage} />

注意: React Router v4 不兼容 react-router-relay (在这里阅读更多).请改用 v3 或更早版本(推荐 v2).

Note: React Router v4 is incompatible with react-router-relay (read more here). Use version v3 or earlier (v2 recommended) instead.

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