开发者问题收集

TypeScript 错误类型‘{}’缺少以下类型的属性

2020-09-18
4374

我刚接触 TypeScript,但遇到了这个错误。

Type '{}' is missing the following properties from type 'Pick<PropsI, "loadUser" | "user">': loadUser, user

上述错误来自 App.text 并指向 <AppRouter/>

我很困惑为什么会遇到这个问题,可能的解决方法是什么?我假设我没有在应用路由器中正确声明某些内容,但我似乎无法弄清楚哪里出了问题或我遇到了什么错误?

App.tsx

import AppRouter from './router/AppRouter'

const App: React.FC = () => {
  return (
    <Fragment>
      <AppRouter />
    </Fragment>
  )
}

export default App

应用路由器


import React, {ExoticComponent, Fragment, useEffect} from 'react'
import {BrowserRouter as Router, Switch, Route} from 'react-router-dom'
import FreeTextView from '../components/analytics/dashboard/freeTextView/FreeTextView'
import {connect, useDispatch, useSelector} from 'react-redux'
import {Nav, IconSvgs} from '@pxhub/shared-components'
import {AppState, UserI, AccessRecordsI} from '../store/actions/Types'
import {loadUser} from '../store/actions/UserActions'

interface PropsI {
  loadUser: () => void
  user: UserI
}

// Defualt Page
const Page = () => {
  return (
    <Fragment>
      <Switch>
        <Route path="/freeview" component={FreeTextView} />
      </Switch>
    </Fragment>
  )
}

// App Router
export const AppRouter: React.FC<PropsI> = ({loadUser, user}: PropsI) => {
  const userAccess = user.accessRecords.map((accessRecord: AccessRecordsI) => {
    return accessRecord.Access_Transaction
  })

  useEffect(() => {
    loadUser()
  })

  return (
    <Fragment>
      <IconSvgs />
      <Nav
        user={user}
        userAccess={userAccess}
        urlPrefix={process.env.REACT_APP_URL_PREFIX}
      />
      <Router>
        <Switch>
          <Route path="/" component={Page} />
        </Switch>
      </Router>
    </Fragment>
  )
}

const dispatch = useDispatch()

const mapDispatchToProps = () => () => {
  dispatch(loadUser())
}
const mapStateToProps = useSelector((state: AppState) => state.user)

export default connect(mapStateToProps, mapDispatchToProps)(AppRouter)

2个回答

您声明 AppRouter 需要 props loaduser 和 user,但随后您在 App.tsx 中调用它时没有这些 props。

编辑:虽然这不是问题中确定的特定 TS 错误的原因,但如评论中所述,它也会导致将 useSelectormapStateToPropsuseDispatchmapDispatchToProps 结合起来出现问题。这些天您可能只想使用钩子。

sam256
2020-09-18

我不太清楚 mapDispatchToProps 的语法。

难道它不应该是这样的吗?

const mapDispatchToProps = () => {
  dispatch(loadUser())
}
Davide Turini
2020-09-18