概要
現在、React + Pusherでリアルタイムのチャット機能を実装していますが、jsxの部分で下記のエラーが発生しました。
具体的には、取得した全メッセージの内容をjsx内でmap()
を使用して表示しているのですがそこでエラーが発生しています。
自分なりに色々調べてArray.from()
でオブジェクトを配列に変換しましたが、解決せず…。
どなたか解決方法のご教授お願い致します。
<Chat.get()でconsole.log()した結果>
useEffect
内のChat.get()
で下記の様な、データベースに保存されたチャットの内容がバックエンドのLaravelから返ってきます。
これをjsx内(messageList
)でArray.from(messages).map()
で回しています。
{messages: Array(10)} messages: Array(10) 0: id: 3 board_id: "ldqc10ol" user_id: "a" message: "hello" created_at: "2020-02-14 09:16:27" updated_at: "2020-02-14 09:16:27" __proto__: Object 1: {id: 4, board_id: "ldqc10ol", user_id: "a", message: "d", created_at: "2020-02-14 09:21:23", …} 2: {id: 5, board_id: "ldqc10ol", user_id: "a", message: "l", created_at: "2020-02-14 09:28:25", …} 3: {id: 6, board_id: "ldqc10ol", user_id: "a", message: "kkkk", created_at: "2020-02-14 09:38:07", …} 4: {id: 7, board_id: "ldqc10ol", user_id: "a", message: "あ", created_at: "2020-02-14 09:56:05", …} 5: {id: 8, board_id: "ldqc10ol", user_id: "a", message: "aaaaaa", created_at: "2020-02-14 10:05:55", …} 6: {id: 9, board_id: "ldqc10ol", user_id: "a", message: "a", created_at: "2020-02-14 10:46:31", …} 7: {id: 10, board_id: "ldqc10ol", user_id: "a", message: "a", created_at: "2020-02-14 10:47:22", …} 8: {id: 11, board_id: "ldqc10ol", user_id: "a", message: "a", created_at: "2020-02-14 10:52:25", …} 9: {id: 12, board_id: "ldqc10ol", user_id: "a", message: "a", created_at: "2020-02-14 10:53:46", …} length: 10 __proto__: Array(0) __proto__: Object
エラーの内容
Objects are not valid as a React child (found: object with keys {messageList}). If you meant to render a collection of children, use an array instead.
該当のコード
import React, { useEffect } from 'react' import { useDispatch, useSelector } from 'react-redux' import styled from 'styled-components' import Button from '@material-ui/core/Button' import IconButton from '@material-ui/core/IconButton' import Dialog from '@material-ui/core/Dialog' import DialogActions from '@material-ui/core/DialogActions' import DialogTitle from '@material-ui/core/DialogTitle' import Divider from '@material-ui/core/Divider' import TextsmsIcon from '@material-ui/icons/Textsms' import TelegramIcon from '@material-ui/icons/Telegram' import Chat from './../../../models/Chat' import User from './../../../models/User' import Board from './../../../models/Board' import Pusher from 'pusher-js' Pusher.logToConsole = true const pusher = new Pusher('********', { cluster: 'ap3', forceTLS: true }); const ChatDialog = props => { const { open, onClose, fullScreen } = props const [msg, setMsg] = React.useState('') const [messages, setMessages] = React.useState([]) const userID = useSelector(state => state.UserReducer.userID) let isChanged = true useEffect(() => { const channelName = 'chat-' + Board.getBoardID() const channel = pusher.subscribe(channelName) channel.bind('App\Events\ChatMessageReceived', data => { setMessages([...messages, data]) }) return () => { channel.unbind('App\Events\ChatMessageReceived') } }, [setMessages, messages]) useEffect(() => { const token = JSON.parse(User.get('token')).token const boardID = Board.getBoardID() if (token) { Chat.get(token, boardID) .then(res => { setMessages(res.data.messages) console.log(res.data) }) .catch(e => { console.log(e) }) } }, [isChanged]) const handleOnChangeMsg = e => { setMsg(e.target.value) } const handleSendMsg = () => { const token = JSON.parse(User.get('token')).token const boardID = Board.getBoardID() if (token) { Chat.send(token, boardID, msg) .then(res => { setMsg('') }) .catch(e => { console.log(e) }) } } let messageList = ( Array.from(messages).map((msg, i) => ( <React.Fragment key={i}> {msg.user_id === userID ? <UserMsg>{msg[i]}</UserMsg> : <Msg>{msg[i]}</Msg>} </React.Fragment> )) ) const fullDialog = ( <Dialog fullScreen open={open} scroll="paper" aria-labelledby="alert-dialog-title" aria-describedby="alert-dialog-description" > <Flex> <StyledDialogTitle><StyledTextsmsIcon /><Span>チャット</Span></StyledDialogTitle> <StyledDialogActions> <Button onClick={onClose} color="primary" autoFocus> <Span>閉じる</Span> </Button> </StyledDialogActions> </Flex> <DialogContent> <Textarea placeholder="メッセージを入力" onChange={handleOnChangeMsg} value={msg}></Textarea> <StyledIconButton onClick={handleSendMsg}><StyledTelegramIcon /></StyledIconButton> </DialogContent> <MessageArea> {messages.length === 0 ? <p>メッセージがありません</p> : { messageList } } </MessageArea> </Dialog > ) const nonFullDialog = ( <Dialog open={open} scroll="paper" fullWidth={true} maxWidth="sm" aria-labelledby="alert-dialog-title" aria-describedby="alert-dialog-description" > <Flex> <StyledDialogTitle><StyledTextsmsIcon /><Span>チャット</Span></StyledDialogTitle> <StyledDialogActions> <Button onClick={onClose} color="primary" autoFocus> <Span>閉じる</Span> </Button> </StyledDialogActions> </Flex> <DialogContent> <Textarea placeholder="メッセージを入力" onChange={handleOnChangeMsg} value={msg}></Textarea> <StyledIconButton onClick={handleSendMsg}><StyledTelegramIcon /></StyledIconButton> </DialogContent> <MessageArea> {messages.length === 0 ? <p>メッセージがありません</p> : { messageList } } </MessageArea> </Dialog > ) return ( <> {fullScreen === true ? fullDialog : nonFullDialog} </> ) } const Flex = styled.div` display: flex; justify-content: space-between; background-color: #224272; ` const Textarea = styled.textarea` resize: none; width: 100%; height: 35px; border: 1px solid #224272; ` const Span = styled.span` font-size: 0.9em; color: white; ` const StyledDialogTitle = styled(DialogTitle)` color: white; ` const DialogContent = styled.div` height: 45px; display: flex; justify-content: space-between; padding: 0; padding-left: 5px; padding-top: 5px; ` const MessageArea = styled.div` height: 450px; ` const StyledDialogActions = styled(DialogActions)` ` const StyledIconButton = styled(IconButton)` vertical-align: middle; padding: 0 10px; height: 35px; ` const StyledTextsmsIcon = styled(TextsmsIcon)` vertical-align: middle; margin-right: 3px; ` const StyledTelegramIcon = styled(TelegramIcon)` vertical-align: middle; padding: 0; ` const Msg = styled.p` width: 100% text-align: left; ` const UserMsg = styled.p` width: 100% text-align: right; ` export default ChatDialog
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