Discord机器人on_raw_reaction_remove事件报错AttributeError求助

我正在开发一个Discord机器人（感谢社区用户之前的帮助让它正常运行），现在遇到添加角色后无法移除角色的问题。终端抛出如下错误：

2023-02-28 12:06:37 ERROR    discord.client Ignoring exception in on_raw_reaction_remove
Traceback (most recent call last):
  File "C:\Python311\Lib\site-packages\discord\client.py", line 409, in _run_event
    await coro(*args, **kwargs)
  File "e:\Turlington - Test\bot.py", line 155, in on_raw_reaction_remove
    role = get(payload.member.guild.roles, id=1080163217877254174)
               ^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'guild'

错误原因是on_raw_reaction_remove事件处理函数中，payload.member为None，无法访问guild属性。以下是我的代码：

import os
import datetime
import asyncio
from typing import Self
import requests as rq
import discord
import discord.ext
from discord.utils import get
from discord.ext import commands
from dotenv import load_dotenv

load_dotenv()
TOKEN = os.getenv('DISCORD_TOKEN')
intents = discord.Intents.all()bot = discord.Client(intents=discord.Intents.default())
bot = commands.Bot(command_prefix="?", intents=intents)
self = bot
class Embed(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

@bot.event
async def on_raw_reaction_add(payload):
    guild = bot.get_guild(payload.guild_id) # Get guild
    member = get(guild.members, id=payload.user_id) # Get the member out of the guild
    # The channel ID should be an integer:
    if payload.channel_id == 1080162990181064714: # Only channel where it will work
        if str(payload.emoji) == "❌": # Your emoji
            role = get(payload.member.guild.roles, id=1080163217877254174) # Role ID
        else:
            role = get(guild.roles, name=payload.emoji)
        if role is not None: # If role exists
            await payload.member.add_roles(role)
            print(f"Added {role}")

@bot.event
async def on_raw_reaction_remove(payload):
    guild = bot.get_guild(payload.guild_id)
    member = guild.get_member(payload.user_id)
    if payload.channel_id == 1080162990181064714:
        if str(payload.emoji) == "❌":
                role = get(payload.member.guild.roles, id=1080163217877254174)
        else:
            role = get(guild.roles, name=payload.emoji)
        if role is not None:
            await payload.member.remove_roles(role)
            print(f"Removed {role}")


bot.run(TOKEN)

问题根源 #

在on_raw_reaction_remove事件中，payload.member字段不存在或为None——Discord的RawReactionActionEvent payload里，member属性仅在on_raw_reaction_add事件中保证存在（当用户是服务器成员时），而在移除反应时，该字段不会被提供，因此不能依赖它来获取成员或公会信息。

你已经在函数开头获取了guild和member变量，但后续代码仍在使用payload.member，这就是错误的直接来源。

修复步骤 #

1. 在两个事件处理函数中，统一使用已经获取到的member变量，而非payload.member
2. 确保获取角色时，使用已有的guild对象，避免依赖payload.member
3. 增加空值判断，处理用户已离开服务器或公会不存在的情况

修正后的代码 #

import os
import datetime
import asyncio
from typing import Self
import requests as rq
import discord
import discord.ext
from discord.utils import get
from discord.ext import commands
from dotenv import load_dotenv

load_dotenv()
TOKEN = os.getenv('DISCORD_TOKEN')
intents = discord.Intents.all()
# 移除多余的discord.Client初始化，避免实例冲突
bot = commands.Bot(command_prefix="?", intents=intents)

class Embed(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

@bot.event
async def on_raw_reaction_add(payload):
    guild = bot.get_guild(payload.guild_id)
    if not guild:
        return
    member = guild.get_member(payload.user_id)
    if not member:
        return
    if payload.channel_id == 1080162990181064714:
        if str(payload.emoji) == "❌":
            role = get(guild.roles, id=1080163217877254174)
        else:
            role = get(guild.roles, name=str(payload.emoji))
        if role is not None:
            await member.add_roles(role)
            print(f"Added {role} to {member}")

@bot.event
async def on_raw_reaction_remove(payload):
    guild = bot.get_guild(payload.guild_id)
    if not guild:
        return
    member = guild.get_member(payload.user_id)
    if not member:
        print(f"Member {payload.user_id} not found in guild, skipping role removal")
        return
    if payload.channel_id == 1080162990181064714:
        if str(payload.emoji) == "❌":
            role = get(guild.roles, id=1080163217877254174)
        else:
            role = get(guild.roles, name=str(payload.emoji))
        if role is not None:
            await member.remove_roles(role)
            print(f"Removed {role} from {member}")

bot.run(TOKEN)

额外优化说明 #

• 移除了多余的discord.Client初始化代码，避免实例冲突
• 增加了guild和member的空值判断，防止后续代码报错
• 统一使用str(payload.emoji)获取表情字符串，避免类型匹配问题
• 在移除角色时，处理了用户已离开服务器的情况（member为None时直接返回）

内容的提问来源于stack exchange，提问作者iandrice