本文介绍了mapStateToProps必须返回一个对象.而是收到了地图{}?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
你好,我使用Immuteble Map表示状态,当我尝试使用maspStateToProps时出现此错误.
Hello i use Immuteble Map for state and when i try maspStateToProps i have this error.
这是我的代码:
组件:
const mapStateToProps = (state) => {
return state
}
class LoanCalculator extends React.Component{
componentWillMount(){
this.dispatch(loadConstraints());
}
render(){
return (
<div>
<h1> Loan Calculator </h1>
<SlidersBox {...this.props}/>
</div>
)
}
}
LoanCalculator = connect(
mapStateToProps
)(LoanCalculator)
export default LoanCalculator
减速器
import { Map } from 'immutable'
import {LOAD_CONSTRAINTS, SET_AMOUNT_VALUE, SET_TERM_VALUE} from "../actions/actions";
const initialState = new Map();
export default function calculator(state = initialState, action){
switch (action.type){
case LOAD_CONSTRAINTS:
return state.set("constraints", action.constraints)
case SET_AMOUNT_VALUE:
return state.set("selectedAmount", action.amount)
case SET_TERM_VALUE:
return state.set("selectedTerm", action.term)
default:
return state
}
}
推荐答案
此github问题涵盖了这个确切的问题: https://github.com/reactjs/react-redux/issues/60 .
This github issue covers this exact problem: https://github.com/reactjs/react-redux/issues/60.
您可以在mapStateToProps函数中从地图中手动提取所需的值:
You can manually extract the values you want from your Map in your mapStateToProps function:
const mapStateToProps = (state) => {
return {
constraints: state.get('constraints'),
selectedAmount: state.get('selectedAmount'),
selectedTerm: state.get('selectedTerm'),
};
}
这篇关于mapStateToProps必须返回一个对象.而是收到了地图{}?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!