失败的道具类型：``在``中标记为必需，但其值为'undefined`

Question

我正在使用流并从另一个组件传递状态。我正在使用proptypes和statetypes。如何解决此错误？警告：失败的道具类型：提供给business_size的string类型的无效道具RoiCalculator，预计number。在RoiCalculator

的WebPack / roi_calculator / main.jsx

 export type StateType = {
  business_size: number,
  organisation_name: string,
  pay_period: boolean,
  timesheet_savings: number,
  roster_optimisation: number,
  reduction_time: number,
  elimination_award: number,
  annual_savings: number,
  annual_subscription: number,
  roi: number,
}

export type PropsType = {
  business_size: number,
  organisation_name: string,
  pay_period: boolean,
  timesheet_savings: number,
  roster_optimisation: number,
  reduction_time: number,
  elimination_award: number,
  annual_savings: number,
  annual_subscription: number,
  roi: number,
}

export default class RoiCalculator extends 
 React.Component<PropsType, StateType> {
 constructor (props: PropsType) {
   super(props)
   this.state = {
     business_size: this.props.business_size,
     organisation_name: this.props.organisation_name,
     pay_period: this.props.pay_period,
     timesheet_savings: 0,
     roster_optimisation: 0,
     reduction_time: 0,
     elimination_award: 0,
     annual_savings: 0,
     annual_subscription: 0,
     roi: 0,
   }
 }

<RoiAssumptions results={this.state}/>

的WebPack / roi_calculator /视图/ RoiAssumptions / index.jsx

export type PropsType = {
  business_size: number,
  organisation_name: string,
  pay_period: boolean,
  timesheet_savings: number,
  roster_optimisation: number,
  reduction_time: number,
  elimination_award: number,
  annual_savings: number,
  annual_subscription: number,
  roi: number,
}
 const t = (key, ...args) => globalT(`js.roi_calculator.${key}`, ...args)

export default class RoiAssumptions extends 
React.Component<PropsType, StateType> {
  constructor (props: PropsType) {
     super(props)
  }

        <div className={styles.aside__value}>
          <p>$ 
{this.roundOffResult(this.props.results.timesheet_savings)}</p>      
        </div>

Answer 1

假设标题中建议的错误（必填字段具有值undefined）和问题中的错误（无效类型string，预期number）略有不同，我将尝试解决后者。我会寻找RoiCalculator检查prop的business_size不作为字符串传递的任何地方。例如，以下代码段会违反道具类型检查：

<RoiCalculator business_size="30" {...otherProps}/>
<RoiCalculator business_size={"30"} {...otherProps}/>

但这是正确的

<RoiCalculator business_size={30} {...otherProps}/>