如何从消息 ID 中获取消息内容/嵌入？

Question

I want to know how to get a message content (specifically the embeds) from the message id ? Just like you can get the member using a member id

Answer 1

on_raw_reaction_add() example:

@bot.event
async def on_raw_reaction_add(payload):
    channel = bot.get_channel(payload.channel_id)
    msg = await channel.fetch_message(payload.message_id)
    embed = msg.embeds[0]
    # do something you want to

---

Command example:

@bot.command()
async def getmsg(ctx, channel: discord.TextChannel, msgID: int):
    msg = await channel.fetch_message(msgID)
    await ctx.send(msg.embeds[0].description)

In the command I'm passing in channel and msgID , so a sample command execution would like !getmsg #general 112233445566778899 - the channel must be in the same server that you're executing the command in!

Then I'm getting the message object using the fetch_message() coroutine, which allows me to get a list of embeds in said message. I then choose the first, and only, embed by choosing position index 0 .

After that, the bot then sends the description (or whatever attribute you'd like) of the embed.

---

References:

• discord.TextChannel
• TextChannel.fetch_message()
• Message.embeds
• discord.Embed - This is where you can find the different attributes of the embed
• commands.command() - Command decorator
• on_raw_reaction_add()
• discord.RawReactionActionEvent - The payload returned from the reaction event
• RawReactionActionEvent.message_id - The ID of the message which was reacted to
• RawReactionActionEvent.channel_id - The text channel that the reaction was added in

Answer 2

@bot.event 
async def on_raw_reaction_add(ctx):
    if (ctx.user_id != bot_id):
        channel = bot.get_channel(ctx.channel_id)
        msg = await channel.fetch_message(ctx.message_id)
        msg_embed = msg.embeds[0]
    
        if (...):

When I use this, terminal always send me that, but I don't understand where is the problem

Ignoring exception in on_raw_reaction_add
Traceback (most recent call last):
  File "...\client.py", line 343, in _run_event
    await coro(*args, **kwargs)
  File "...\main.py", line 124, in on_raw_reaction_add
    msg_embed = msg.embeds[0]
IndexError: list index out of range