Discord.JS fetchMessage()答案

【问题标题】：Discord.JS fetchMessage()Discord.JS fetchMessage()
【发布时间】：2020-11-07 12:40:04
【问题描述】：

我的 Discord.JS 机器人有问题，我想在特定的公会和频道中编辑嵌入，但是当我尝试运行命令时，它会出错

/root/my-bot/my-bot.js:550
    guild.channels.get(channel).fetchMessage(user).edit(newMessage);
                               ^

TypeError: Cannot read property 'fetchMessage' of undefined
at Client.<anonymous> (/root/my-bot/my-bot.js:550:31)
at Client.emit (events.js:315:20)
at MessageCreateHandler.handle (/root/my-bot/node_modules/discord.js/src/client/websocket/packets/handlers/MessageCreate.js:9:34)
at WebSocketPacketManager.handle (/root/my-bot/node_modules/discord.js/src/client/websocket/packets/WebSocketPacketManager.js:105:65)
at WebSocketConnection.onPacket (/root/my-bot/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:333:35)
at WebSocketConnection.onMessage (/root/my-bot/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:296:17)
at WebSocket.onMessage (/root/my-bot/node_modules/ws/lib/event-target.js:120:16)
at WebSocket.emit (events.js:315:20)
at Receiver.receiverOnMessage (/root/my-bot/node_modules/ws/lib/websocket.js:789:20)
at Receiver.emit (events.js:315:20)

这是我的命令代码：

 if(message.content.startsWith(prefix + "edit"))
 {
     message.delete();
     let guild = client.guilds.get('server-id')
     const channel = args[0];
     const user = args[1];
     let newMessage = args.slice(2).join(' ');
     guild.channels.get(channel).fetchMessage(user).edit(newMessage);
}

【问题讨论】：

标签： javascript node.js fetch discord.js

【解决方案1】：

> 如果您使用的是 Discord.js v11，问题可能来自您在命令中提供的频道 ID。
>您似乎试图从用户那里获取消息，但方法 .fetchMessage() 将 message id 作为参数（请参阅Discord.js documentation）。
> 您可以使用 .then(callback function) 访问获取的 Message

修复

if(message.content.startsWith(prefix + "edit"))
 {
     message.delete();
     let guild = client.guilds.get('server-id');
     const channel = args[0];
     const messageId = args[1];
     let newMessage = args.slice(2).join(' ');
     let fetchedChannel = guild.channels.get(channel);
     if (!fetchedChannel) return console.log('Channel not found');
     fetchedChannel.fetchMessage(messageId).then(message => {
         message.edit(newMessage);
     }).catch(error => console.error(error));
}

【讨论】：

【解决方案2】：

Here is a possible fix:

 const prefix = 'YOUR_PREFIX';
if(message.content.startsWith(prefix + "edit"))
 {
     message.delete();
     let guild = client.guilds.get('server-id');
     const channel = args[0];
     const messageId = args[1];
     let newMessage = args.slice(2).join(' ');
     let fetchedChannel = guild.channels.get(channel);
     if (!fetchedChannel) {
         return console.log('Channel not found');
     }
     fetchedChannel.fetchMessage(messageId).then(message) => {
         message.edit(newMessage);
     }).catch(error => console.error(error));
}

【讨论】：