如何从已删除的消息中获取嵌入内容？

Posted 2023-03-13

【中文标题】如何从已删除的消息中获取嵌入内容？

【英文标题】：How to get embed content from a deleted message?

【发布时间】：2021-07-03 02:51:47

【问题描述】：

    @commands.Cog.listener()
    async def on_raw_message_delete(self, payload):
        try:
            conn.reconnect()
        except:
            pass
        print("deleted")
        channel=self.client.get_channel(payload.channel_id)
        message=await channel.fetch_message(payload.message_id) #<===========
        emb=message.embeds
        for mes in emb:
            cursor.execute(f"DELETE FROM suggestions WHERE channel_id=payload.channel_id and id=payload.guild_id and code=mes.fields[1].value")
            conn.commit()

discord.errors.NotFound: 404 Not Found (error code:10008): Unknown message

当我将代码更改为此时，它显示了另一个错误

    @commands.Cog.listener()
    async def on_raw_message_delete(self, payload):
        try:
            conn.reconnect()
        except:
            pass
        print("deleted")
        channel=self.client.get_channel(payload.channel_id)
        message=payload.cached_message
        emb=message.embeds  #<===========
        for mes in emb:
            cursor.execute(f"DELETE FROM suggestions WHERE channel_id=payload.channel_id and id=payload.guild_id and code=mes.fields[1].value")
            conn.commit()

AttributeError: 'NoneType' 对象没有属性 'embeds'

如何从嵌入中获取内容？

【问题讨论】：

我认为错误不言自明，您无法获取不存在的消息

以及如何从不存在的消息（嵌入）中获取内容？

如果我之前的评论不够明显，你不能。除非它被机器人缓存

【参考方案1】：

如果你想从消息中嵌入，你可以使用on_message_delete事件，因为它给你消息对象，像这样：

async def on_message_delete(message): # Event that triggers every time a message is deleted
    try:
        conn.reconnect()
    except:
        pass
    print("Deleted")
    emb = message.embeds
    for mes in emb:
        cursor.execute(f"DELETE FROM suggestions WHERE channel_id=message.channel.id and id=message.guild.id and code=mes.fields[1].value")
        conn.commit()

【讨论】：

那我重启后无法从旧邮件中获取内容