next.js 类型“ContextProps”上不存在属性“filter”

cnwbcb6i  于 2023-10-18  发布在  其他
关注(0)|答案(1)|浏览(109)

我正在尝试根据状态有条件地渲染一些卡片项目。我在一个NextJS 13项目建设像一个12。
typescript 版本是:“5.2.2”
它抛出了这个错误,我不明白为什么:类型“ContextProps”上不存在属性“filter”。
顺便说一句..
代码如下:
EntryContext.tsx:

import { createContext, useReducer, useContext } from 'react';
import { entriesReducer } from './';
import { Entry } from '../../interfaces';
import { generateId } from '../../utils';

export type ContextProps = {
  entries: Entry[]
}

export type EntriesState = {
  entries: Entry[]
}

const ENTRIES_INITIAL_STATE: EntriesState = {
  entries: [
    {
      _id: generateId(),
      description: 'Esto es una prueba',
      createdAt: Date.now().toString(),
      status: 'Pending'
    },
    {
      _id: generateId(),
      description: 'Esto es una prueba',
        createdAt: (Date.now() - 10000).toString(),
        status: 'In-progress'
      },
      {
        _id: generateId(),
        description: 'Esto es una prueba',
        createdAt: (Date.now() - 100000).toString(), 
      status: 'Finished'
    },
  ]
}

export const EntriesContext = createContext<ContextProps>({
  entries: []
})

export const EntriesProvider = (
  { 
    children 
}: { 
    children: React.ReactNode 
}): JSX.Element => {
  const [state, dispatch] = useReducer(entriesReducer, ENTRIES_INITIAL_STATE)

  return (
    <EntriesContext.Provider value={{
      ...state
    }}>
      {children}
    </EntriesContext.Provider>
  )
}

export const useEntries = () => useContext(EntriesContext)

问题就在这里,在渲染器常数中
EntryList.tsx:

import { List, Paper } from "@mui/material"
import { EntryCard } from "./EntryCard"
import { Entry, Status } from "../../interfaces"
import { useEntries } from "../../context/entries"

type Props = {
  status: Status
}

export const EntryList = ({ status }: Props): JSX.Element => {
  const entries = useEntries()

  const renderEntries = entries
    .filter((entry: Entry) => entry.status === status)
    .map((entry: Entry) => (
      <EntryCard
        key={entry._id}
        entry={entry}
      />
    ))
  return (
    <div

    >
      <Paper
        sx={{
          height: 'calc(100vh - 160px)',
          overflowY: 'auto',
          backgroundColor: 'transparent',
          padding: 1,
        }}
      >
        <List
          sx={{
            opacity: 1
          }}
        >

        </List>
      </Paper>
    </div>
  )
}
tyky79it

tyky79it1#

您的上下文是一个具有entries属性的对象

export const EntriesContext = createContext<ContextProps>({
  entries: []
})

当你写const entries = useEntries()entries的类型是{entries: []},你不能过滤对象(entries.filter)。

您可以通过以下方式解决此问题:

1.从上下文中解构条目

const {entries} = useEntries()
const entries = useEntries()

const renderEntries = entries.entries
    .filter((entry: Entry) => entry.status === status)
    .map((entry: Entry) => (
      <EntryCard
        key={entry._id}
        entry={entry}
      />
    ))

1.挂钩结构

export const useEntries = () => {
  const ctx = useContext(EntriesContext)
  return ctx.entries
}

1.将数组而不是对象传递给上下文

const EntriesContext = createContext([])

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