如何在Discord Cogs中构建选择菜单？交互失败问题求助

你的代码存在两个核心问题，直接导致了"Interaction failed"提示：

1. 回调函数语法错误（缩进问题） #

select_callback函数内部的代码没有缩进，这会触发语法错误，机器人处理交互时会抛出异常，无法正常响应请求。

2. 数据类型不匹配 #

你给选项设置的value是整数类型（1、2、3），但回调函数里判断的是字符串类型（'1'、'2'、'3'），条件永远无法成立，因此没有发送任何响应给Discord，平台等待超时后就会判定交互失败。

修正后的代码 #

import discord
from discord.ext import commands
from discord import app_commands

async def select_callback(interaction: discord.Interaction):
    # 修复缩进问题
    result = interaction.data.get('values')
    result = result[0]
    print(result)
    # 统一数据类型，改为判断整数
    if result == 1:
        await interaction.response.send_message("success1")
    elif result == 2:
        await interaction.response.send_message('success2')
    elif result == 3:
        await interaction.response.send_message("success3")


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

    @app_commands.command(name = "view_base", description = "Simple View Example")
    async def view_base(self, interaction: discord.Interaction):
        view = discord.ui.View()
        select1 = discord.ui.Select()
        select1.add_option(label="A", value = 1, description="Explain a")
        select1.add_option(label="B", value = 2, description="Explain B")
        select1.add_option(label="C", value = 3, description="Explain C")
        select1.callback = select_callback
        view.add_item(select1)
        await interaction.response.send_message(view = view)


async def setup(bot):
    await bot.add_cog(aButton(bot))

更规范的写法（推荐） #

使用类继承定义Select组件，避免直接赋值callback的潜在作用域问题，代码也更易维护：

import discord
from discord.ext import commands
from discord import app_commands

class MySelect(discord.ui.Select):
    def __init__(self):
        options = [
            discord.SelectOption(label="A", value=1, description="Explain a"),
            discord.SelectOption(label="B", value=2, description="Explain B"),
            discord.SelectOption(label="C", value=3, description="Explain C")
        ]
        super().__init__(options=options)

    async def callback(self, interaction: discord.Interaction):
        result = self.values[0]
        print(result)
        if result == 1:
            await interaction.response.send_message("success1")
        elif result == 2:
            await interaction.response.send_message('success2')
        elif result == 3:
            await interaction.response.send_message("success3")

class MyView(discord.ui.View):
    def __init__(self):
        super().__init__()
        self.add_item(MySelect())

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

    @app_commands.command(name = "view_base", description = "Simple View Example")
    async def view_base(self, interaction: discord.Interaction):
        await interaction.response.send_message(view=MyView())

async def setup(bot):
    await bot.add_cog(aButton(bot))

内容的提问来源于stack exchange，提问作者user_Kaito