问题描述
我正在尝试与构建React应用程序的团队合作，并试图找出创建更高阶React组件（另一个包装另一个组件）的最佳方法，以便与Redux数据一起执行身份验证商店。
I'm trying to work with a team building a React application, and trying to figure out the best way to create a "higher-order" React component (one that wraps another) to perform Authentication in conjunction with the Redux data store.
到目前为止，我的方法是创建一个模块，该模块由一个函数组成，该函数根据是否有经过身份验证的用户返回一个新的React组件。 / p>
My approach thus far has been to create a module that consists of a function that returns a new React component depending on whether or not there is an authenticated user.
export default function auth(Component) {
class Authenticated extends React.Component {
// conditional logic
render(){
const isAuth = this.props.isAuthenticated;
return (
<div>
{isAuth ? <Component {...this.props} /> : null}
</div>
)
}
}
...
return connect(mapStateToProps)(Authenticated);
}
这使我团队中的其他人可以轻松指定组件是否需要某些权限。
This makes it easy for other people on my team to specify whether or not a component requires certain permissions.
render() {
return auth(<MyComponent />);
}
如果您正在执行基于角色的检查，这种方法是有道理的，就像你一样可能只有几个角色。在这种情况下，您只需拨打 auth（< MyComponent />，admin）。
If you are performing role-based checks, this approach makes sense, as you may only have a few roles. In such a case, you could just call auth(<MyComponent />, admin).
传递对于基于权限的检查，参数变得难以处理。但是，在构建组件时（以及在团队环境中可管理），可以在组件级别指定权限。设置静态方法/属性似乎是一个不错的解决方案，但据我所知，es6类导出为函数，它们不会显示可调用方法。
Passing arguments becomes unwieldy for permissions-based checks. It may however be feasible to specify permissions at the component level as the components are being constructed (as well as manageable in a team environment). Setting static methods/properties seems like a decent solution, but, as far as I can tell, es6 classes export as functions, which don't reveal callable methods.
有没有办法访问导出的React组件的属性/方法，以便可以从包含组件访问它们？
推荐答案
onEnter 很棒，在某些情况下非常有用。但是，以下是一些常见的身份验证和授权问题onEnter无法解决：
onEnter is great, and useful in certain situations. However, here are some common authentication and authorization problems onEnter does not solve:
确定redux存储数据的身份验证/授权（）
如果商店更新（但不是
当前路线），请重新检查身份验证/授权
- Decide authentication/authorization from redux store data (there aresome workarounds)
Recheck authentication/authorization if the store updates (but notthe current route)
如果子路线在受保护路线下更改
，则重新检查身份验证/授权
Recheck authentication/authorization if a child route changesunderneath the protected route
替代方案方法是使用高阶组件。
您可以使用 提供更高阶的组件，以便于阅读和应用组件的身份验证和授权约束。
You can use Redux-auth-wrapper provides higher-order components for easy to read and apply authentication and authorization constraints for your components.
要获得可以使用的子方法： refs，回调和来自refs的回调
要获得子道具，您可以使用： this.refs.child.props.some或compInstance.props.some
To get child props you can use:this.refs.child.props.some or compInstance.props.some
方法和道具示例：
class Parent extends Component {
constructor(props){
super(props);
this.checkChildMethod=this.checkChildMethod.bind(this);
this.checkChildMethod2=this.checkChildMethod2.bind(this);
this.checkChildMethod3=this.checkChildMethod3.bind(this);
}
checkChildMethod(){
this.refs.child.someMethod();
console.log(this.refs.child.props.test);
}
checkChildMethod2(){
this._child2.someMethod();
console.log(this._child2.props.test);
}
checkChildMethod3(){
this._child3.someMethod();
console.log(this._child3.props.test);
}
render(){
return (
<div>
Parent
<Child ref="child" test={"prop of child"}/>
<ChildTwo ref={c=>this._child2=c} test={"prop of child2"}/>
<ChildThree returnComp={c=>this._child3=c} test={"prop of child3"}/>
<input type="button" value="Check method of child" onClick={this.checkChildMethod}/>
<input type="button" value="Check method of childTwo" onClick={this.checkChildMethod2}/>
<input type="button" value="Check method of childThree" onClick={this.checkChildMethod3}/>
</div>
);
}
}
class Child extends Component {
someMethod(){
console.log('someMethod Child');
}
render(){
return (<div>Child</div>);
}
}
class ChildTwo extends Component {
someMethod(){
console.log('someMethod from ChildTwo');
}
render(){
return (<div>Child</div>);
}
}
class ChildThree extends Component {
componentDidMount(){
this.props.returnComp(this);
}
someMethod(){
console.log('someMethod from ChildThree');
}
render(){
return (<div>Child</div>);
}
}
这篇关于来自React / Redux应用程序中的组件的权限检查的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！