在 react-router v4 中获取路径参数 [英] Get path params in react-router v4

问题描述

我正在尝试通过我的应用程序构建路由器链接，

在这个场景中，我有三个文件.

App.js

Book.js

DetailedView.js

我在 Book 内部建立了一个 <Link> 仅在悬停(在书籍封面上)时出现

{this.state.isHovered ?(<链接到={`/details/${this.props.book.industryIdentifiers[1].identifier}`}><div className="hover-box"></div></Link>) : ( <div/> )}

这将带我到/details/12345(isbn10 编号)

我很难理解的是如何例如setState({iPressedThisBook}) 当按下 或者我可以使用 /12345 之后的部分来创建一个过滤器>

因为在 App 中，Route 将被连接为...

(<BookDetailedViewbookStateUpdated = {this.bookStateUpdated}书 = {this.state.books}/>)}/>

我稍后想要获取 :id 以便我在我的 this.props.book.find(:id) 中创建一个 this.props.book.find(:id)代码>

解决方案

为了在你的组件中接收路径参数，你需要首先将你的组件与 react 中的 withRouter HOC 连接起来-router 以便您可以访问路由器道具并从 match 道具中获取路径 params 作为 this.props.match.params.id

示例代码:

import {withRouter} from 'react-router';class BookDetailedView 扩展 React.Component {使成为() {var id = this.props.match.params.id}}导出默认 withRouter(BookDetailedView) ;

或者简单地在路由中使用渲染道具传递它

(<BookDetailedViewbookStateUpdated = {this.bookStateUpdated}书 = {this.state.books}id={match.params.id}/>)}/>

来自 match

<块引用>

匹配

匹配对象包含有关 如何匹配的信息网址.match 对象包含以下属性:

• params - (object) 从对应于路径动态段的 URL 解析出的键/值对
• isExact - (布尔值)如果整个 URL 匹配(无尾随字符)为真
• path - (字符串)用于匹配的路径模式.用于构建嵌套 s
• url -(字符串)URL 的匹配部分.用于构建嵌套 s

您可以在不同的地方访问匹配对象:

1. 将组件路由为 this.props.match
2. 路由渲染为 ({ match }) => ()
3. 将子级路由为 ({ match }) => ()
4. withRouter as this.props.match
5. matchPath 作为返回值

如果 Route 没有路径，因此总是匹配，您将获得最接近的父匹配.withRouter 也一样

I'm trying to build a router link through my application,

In this scenario, I have three files.

App.js

Book.js

DetailedView.js

I have inside of Book built up a <Link> that only appears when hovered ( over a book cover )

{this.state.isHovered ? (
   <Link to={`/details/${this.props.book.industryIdentifiers[1].identifier}`}>
<div className="hover-box"></div>
</Link>) : ( <div /> )}

This will take me to a /details/12345 (isbn10 number)

The thing I have a hard time to understand is how to for example setState({iPressedThisBook}) when pressing <Link> or if i can use the part after /12345 to create like a filter

Because in App the Route will be hooked up as...

<Route path="/details/:id" render={() => (
          <BookDetailedView
            bookStateUpdated = {this.bookStateUpdated}
            book = {this.state.books}
          />
)}/>

I, later on, want to grab the :id so that I make for example a this.props.book.find(:id) inside of my <BookDetailedView>

解决方案

In order to receive the path param in you component, you need to first connect your component with withRouter HOC from react-router so that you can access the Router props and get the path params from the match props as this.props.match.params.id

Sample Code:

import {withRouter} from 'react-router';

class BookDetailedView extends React.Component {
    render() {
        var id = this.props.match.params.id


    }
}
export default withRouter(BookDetailedView) ;

or simply passing it with render prop in route as

<Route path="/details/:id" render={({match}) => (
          <BookDetailedView
            bookStateUpdated = {this.bookStateUpdated}
            book = {this.state.books}
            id={match.params.id}
          />
)}/>

From the React Documentation of match

match

A match object contains information about how a <Route path> matched the URL. match objects contain the following properties:

• params - (object) Key/value pairs parsed from the URL corresponding to the dynamic segments of the path
• isExact - (boolean) true if the entire URL was matched (no trailing characters)
• path - (string) The path pattern used to match. Useful for building nested s
• url - (string) The matched portion of the URL. Useful for building nested s

You’ll have access match objects in various places:

1. Route component as this.props.match
2. Route render as ({ match }) => ()
3. Route children as ({ match }) => ()
4. withRouter as this.props.match
5. matchPath as the return value

If a Route does not have a path, and therefore always matches, you’ll get the closest parent match. Same goes for withRouter

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