在 Link react-router 中传递道具

Question

我正在使用 react-router 进行反应。

我正在尝试在 react-router 的“链接”中传递属性

var React  = require('react');
var Router = require('react-router');
var CreateIdeaView = require('./components/createIdeaView.jsx');

var Link = Router.Link;
var Route = Router.Route;
var DefaultRoute = Router.DefaultRoute;
var RouteHandler = Router.RouteHandler;
var App = React.createClass({
  render : function(){
    return(
      <div>
        <Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>
        <RouteHandler/>
      </div>
    );
  }
});

var routes = (
  <Route name="app" path="/" handler={App}>
    <Route name="ideas" handler={CreateIdeaView} />
    <DefaultRoute handler={Home} />
  </Route>
);

Router.run(routes, function(Handler) {

  React.render(<Handler />, document.getElementById('main'))
});

“链接”呈现页面但不将属性传递给新视图。

下面是查看代码

var React = require('react');
var Router = require('react-router');

var CreateIdeaView = React.createClass({
  render : function(){
    console.log('props form link',this.props,this)//props not recived
  return(
      <div>
        <h1>Create Post: </h1>
        <input type='text' ref='newIdeaTitle' placeholder='title'></input>
        <input type='text' ref='newIdeaBody' placeholder='body'></input>
      </div>
    );
  }
});

module.exports = CreateIdeaView;

如何使用“链接”传递数据？

原文由 vishal atmakuri 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

此行缺少 path ：

 <Route name="ideas" handler={CreateIdeaView} />

应该：

 <Route name="ideas" path="/:testvalue" handler={CreateIdeaView} />

鉴于以下 Link （过时的 v1） ：

 <Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>

从 v4/v5 开始更新：

 const backUrl = '/some/other/value'
 // this.props.testvalue === "hello"

 // Using query
 <Link to={{pathname: `/${this.props.testvalue}`, query: {backUrl}}} />

 // Using search
 <Link to={{pathname: `/${this.props.testvalue}`, search: `?backUrl=${backUrl}`} />
 <Link to={`/${this.props.testvalue}?backUrl=${backUrl}`} />

在 withRouter(CreateIdeaView) 组件 render()中， withRouter 高阶组件的过时用法：

 console.log(this.props.match.params.testvalue, this.props.location.query.backurl)
 // output
 hello /some/other/value

在使用 useParams 和 useLocation 钩子的功能组件中：

 const CreatedIdeaView = () => {
 const { testvalue } = useParams();
 const { query, search } = useLocation();
 console.log(testvalue, query.backUrl, new URLSearchParams(search).get('backUrl'))
 return <span>{testvalue} {backurl}</span>
 }

从您在文档上发布的链接到页面底部：

给定一个像 <Route name="user" path="/users/:userId"/> 这样的路由

---

使用一些存根查询示例更新了代码示例：

 // import React, {Component, Props, ReactDOM} from 'react';
 // import {Route, Switch} from 'react-router'; etc etc
 // this snippet has it all attached to window since its in browser
 const {
 BrowserRouter,
 Switch,
 Route,
 Link,
 NavLink
 } = ReactRouterDOM;

 class World extends React.Component {
 constructor(props) {
 super(props);
 console.dir(props);
 this.state = {
 fromIdeas: props.match.params.WORLD || 'unknown'
 }
 }
 render() {
 const { match, location} = this.props;
 return (
 <React.Fragment>
 <h2>{this.state.fromIdeas}</h2>
 <span>thing:
 {location.query
 && location.query.thing}
 </span><br/>
 <span>another1:
 {location.query
 && location.query.another1
 || 'none for 2 or 3'}
 </span>
 </React.Fragment>
 );
 }
 }

 class Ideas extends React.Component {
 constructor(props) {
 super(props);
 console.dir(props);
 this.state = {
 fromAppItem: props.location.item,
 fromAppId: props.location.id,
 nextPage: 'world1',
 showWorld2: false
 }
 }
 render() {
 return (
 <React.Fragment>
 <li>item: {this.state.fromAppItem.okay}</li>
 <li>id: {this.state.fromAppId}</li>
 <li>
 <Link
 to={{
 pathname: `/hello/${this.state.nextPage}`,
 query:{thing: 'asdf', another1: 'stuff'}
 }}>
 Home 1
 </Link>
 </li>
 <li>
 <button
 onClick={() => this.setState({
 nextPage: 'world2',
 showWorld2: true})}>
 switch 2
 </button>
 </li>
 {this.state.showWorld2
 &&
 <li>
 <Link
 to={{
 pathname: `/hello/${this.state.nextPage}`,
 query:{thing: 'fdsa'}}} >
 Home 2
 </Link>
 </li>
 }
 <NavLink to="/hello">Home 3</NavLink>
 </React.Fragment>
 );
 }
 }

 class App extends React.Component {
 render() {
 return (
 <React.Fragment>
 <Link to={{
 pathname:'/ideas/:id',
 id: 222,
 item: {
 okay: 123
 }}}>Ideas</Link>
 <Switch>
 <Route exact path='/ideas/:id/' component={Ideas}/>
 <Route path='/hello/:WORLD?/:thing?' component={World}/>
 </Switch>
 </React.Fragment>
 );
 }
 }

 ReactDOM.render((
 <BrowserRouter>
 <App />
 </BrowserRouter>
 ), document.getElementById('ideas'));

 <script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/react-router-dom/4.3.1/react-router-dom.min.js"></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/react-router/4.3.1/react-router.min.js"></script>

 <div id="ideas"></div>

＃更新：

请参阅： https ://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.0.0.md#link-to-onenter-and-isactive-use-location-descriptors

从 1.x 到 2.x 的升级指南：

<Link to> 、 onEnter 和 isActive 使用位置描述符

<Link to> 现在除了字符串之外还可以使用位置描述符。

不推荐使用查询和状态道具。

// v1.0.x

 <Link to="/foo" query={{ the: 'query' }}/>

// v2.0.0

 <Link to={{ pathname: '/foo', query: { the: 'query' } }}/>

// 在 2.x 中仍然有效

<Link to="/foo"/>

同样，从 onEnter 挂钩重定向现在也使用位置

描述符。

// v1.0.x

 (nextState, replaceState) => replaceState(null, '/foo')
 (nextState, replaceState) => replaceState(null, '/foo', { the: 'query' })

// v2.0.0

 (nextState, replace) => replace('/foo')
 (nextState, replace) => replace({ pathname: '/foo', query: { the: 'query' } })

对于自定义的类链接组件，同样适用于 router.isActive，

以前 history.isActive。

// v1.0.x

 history.isActive(pathname, query, indexOnly)

// v2.0.0

 router.isActive({ pathname, query }, indexOnly)

#v3 到 v4 的更新：

• https://github.com/ReactTraining/react-router/blob/432dc9cf2344c772ab9f6379998aa7d74c1d43de/packages/react-router/docs/guides/migrating.md

• https://github.com/ReactTraining/react-router/pull/3803

• https://github.com/ReactTraining/react-router/pull/3669

• https://github.com/ReactTraining/react-router/pull/3430

• https://github.com/ReactTraining/react-router/pull/3443

• https://github.com/ReactTraining/react-router/pull/3803

• https://github.com/ReactTraining/react-router/pull/3636

• https://github.com/ReactTraining/react-router/pull/3397

• https://github.com/ReactTraining/react-router/pull/3288

界面基本还是v2一样，最好看一下react-router的CHANGES.md，因为那是更新的地方。

供后代使用的“遗留迁移文件”

• https://github.com/ReactTraining/react-router/blob/dc7facf205f9ee43cebea9fab710dce036d04f04/packages/react-router/docs/guides/migrating.md

• https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v1.0.0.md

• https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.0.0.md

• https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.2.0.md

• https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.4.0.md

• https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.5.0.md

原文由 jmunsch 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

有一种方法可以传递多个参数。您可以将“to”作为对象而不是字符串传递。

 // your route setup
<Route path="/category/:catId" component={Category} / >

// your link creation
const newTo = {
  pathname: "/category/595212758daa6810cbba4104",
  param1: "Par1"
};
// link to the "location"
// see (https://reacttraining.com/react-router/web/api/location)
<Link to={newTo}> </Link>

// In your Category Component, you can access the data like this
this.props.match.params.catId // this is 595212758daa6810cbba4104
this.props.location.param1 // this is Par1

原文由 Chetan Sisodiya 发布，翻译遵循 CC BY-SA 4.0 许可协议