Discord机器人报错AttributeError: 'diff_btns'对象无'ctx'属性求助

问题概述 #

开发小型服务器Discord机器人时，实现了带Easy/Medium/Hard按钮的交互消息，要求仅命令发起者能操作按钮，但运行时触发错误：AttributeError: 'diff_btns' object has no attribute 'ctx'，错误出现在interaction_check方法中试图访问self.ctx.author的位置。

错误原因 #

你的diff_btns类（继承自discord.ui.View）没有存储ctx对象，创建View实例时只是调用diff_btns()，没有将命令的ctx传入类中，导致类内部无法访问self.ctx。另外按钮回调里还有一个隐藏问题：调用interaction.response.send_message后再调用interaction.response.edit_message会报错，因为同一个interaction的response只能被使用一次。

修复方案 #

1. 给diff_btns类添加__init__方法，接收并保存ctx参数
2. 在quizgk命令中创建View实例时传入ctx：diff_btns(ctx)
3. 将按钮回调里的interaction.response.edit_message替换为interaction.edit_original_response，因为发送消息后需要修改原消息的View，而不是重复使用response

修复后完整代码 #

#Import libraries:
from discord.interactions import Interaction
from discord.ui import Button, View
import discord
import quiz
'''
code to get question:
quiz.get_data(quiz.diff1)
await ctx.respond(quiz.q_output)
'''


bot = discord.Bot()


@bot.event
async def on_ready():
    print(f'We have logged in as {bot.user}')
    

class diff_btns(discord.ui.View):
    def __init__(self, ctx):
        super().__init__()
        self.ctx = ctx  # 保存ctx对象
    
    @discord.ui.button(label="Easy", row=0, style=discord.ButtonStyle.blurple)
    async def button_callback1(self, button, interaction):
        await interaction.response.send_message("You picked easy")
        for child in self.children:
            child.disabled = True
        await interaction.edit_original_response(view=self)  # 修改原消息的View
    
    @discord.ui.button(label="Medium", row=0, style=discord.ButtonStyle.blurple)
    async def button_callback2(self, button, interaction):
        await interaction.response.send_message("You picked medium")
        for child in self.children:
            child.disabled = True
        await interaction.edit_original_response(view=self)

    @discord.ui.button(label="Hard", row=0, style=discord.ButtonStyle.blurple)
    async def button_callback3(self, button, interaction):
        await interaction.response.send_message("You picked hard")
        for child in self.children:
            child.disabled = True
        await interaction.edit_original_response(view=self)
    
    async def interaction_check(self, interaction) -> bool:
        if interaction.user != self.ctx.author:
            await interaction.response.send_message("Use /gkquiz to make your own quiz.", ephemeral=True)
            return False
        else:
            return True

#Quiz question:
@bot.command(description="Starts a general knowledge quiz.")
async def quizgk(ctx):
    #Send message，传入ctx到View实例
    await ctx.respond("How difficult do you want the questions to be?", view=diff_btns(ctx))


bot.run()

内容的提问来源于stack exchange，提问作者ProbablyIdiot