Discord Bot：为什么这个bot可以读取DM但不给服务器角色？

Question

我正在创建一个不和谐的机器人，如果用户在 BOT dm 中输入正确的电子邮件，并在电子邮件前加上“@”（如@example@gmail.com），它可以在 MIAO 服务器中提供示例角色

async def on_message(message):
    #Check if the message is a DM
    if isinstance(message.channel, discord.DMChannel):
        #Check if the message starts with "@"
      if message.content.startswith("@"):
          email = message.content
           # Check if the email is in the database
          if email in email_database:
            # If the email is in the database, then give the user the Example role
            server = message.guild
            role = discord.utils.get(message.guild.roles, name='Example')
            await message.author.add_roles(role)
            await message.channel.send('Email found in the database! You have been given the Example role!')
          else:
            # If the email is not in the database, then tell the user that the email was not found
            await message.channel.send('Email not found in the database!')

我确定电子邮件数据库（我在这些行之前插入代码）。

我怎么解决这个问题？我必须指定哪个服务器吗？

Answer 1

如果消息在 DM 中发送，则 message.guild 将变为 None。我假设您收到一条错误消息。您必须获得guild，然后是公会中的成员，然后以这种方式应用角色。

@client.event
async def on_message(message):
    #Check if the message is a DM
    if isinstance(message.channel, discord.DMChannel):
        #Check if the message starts with "@"
        if message.content.startswith("@"):
            email = message.content
            # Check if the email is in the database
            if email in email_database:
                # If the email is in the database, then give the user the Example role
                
                # change `client` to `bot` or whatever your client/bot object is called
                server = await client.fetch_guild(YOUR_GUILD_ID)
                role = discord.utils.get(server.roles, name='Example')
                # change this to `await server.fetch_member` if you keep getting None but you're _certain_ they exist
                # shouldn't be necessary though as we're fetching the guild
                server_member = server.get_member(message.author.id)
                if not server_member:
                    # user doesn't exist in guild
                    return
                await server_member.add_roles(role)
                await message.channel.send('Email found in the database! You have been given the Example role!')
            else:
                # If the email is not in the database, then tell the user that the email was not found
                await message.channel.send('Email not found in the database!')