channel
未定义为通道名称,因为我可以看到您将channel
定义为db.get(`welcome_${member.guild.id}`)
,因此您将在db.get()
内部返回消息
channel
应定义为channelid
或channelname
let channel = client.channels.cache.find(channel => channel.name.toLowerCase() === "name of channel")
然后
channel.send(`welcome_${member.guild.id}`, attachment)