Discord.js测试斜杠命令报错：setDMPermissions不是函数

我是Discord.js新手，编写测试斜杠命令时遇到错误，错误信息如下：

[ERROR] An error occured inside the command registery:
TypeError: (intermediate value).setName(...).setDescription(...).setDMPermissions is not a function

我的代码：

const {SlashCommandBuilder, PermissionFlagsBits} = require('discord.js');

module.exports = {
    data: new SlashCommandBuilder()
     .setName('test')
     .setDescription('Test if everything is working.')
     .setDMPermissions(false)
     .addSubcommandGroup((subcommandgroup) => 
        subcommandgroup
         .setName("user")
         .setDescription("Configure an user.")
         .addSubcommand((subcommand) => 
            subcommand
                .setName("role")
                .setDescription("Configure an user's role.")
                .addUserOption((option) => 
                    option
                    .setName("user")
                    .setDescription("The user to configure.")
            ),
        )
        .addSubcommand((subcommand) => 
            subcommand
                .setName("nickname")
                .setDescription("Configure an user's nickname.")
                .addStringOption((option) => 
                    option
                    .setName("nickname")
                    .setDescription("The nickname the user should have.")
                .addUserOption((option) => 
                    option
                    .setName("user")
                    .setDescription("The user to configure.")
            ),
            )
        )
        .addSubcommand((subcommand) => 
            subcommand
                .setName("message")
                .setDescription("Configure a message.")
        )
    )
    .toJSON(),
    userPermissions: [PermissionFlagsBits.ManageMessages],
    botPermissions: [PermissionFlagsBits.Connect],

    run: (client, interaction) => {
        return interaction.reply("This is a test command.")
    }
};

我试过增删代码、合并代码行，都没解决，求帮忙修复。

这个错误的核心原因是：带有子命令/子命令组的斜杠命令，不能直接在根命令上调用setDMPermissions()方法。Discord.js的规则是，当命令包含子命令或子命令组时，DM权限需要设置在子命令层级，而非根命令。

另外你的代码还有两处语法错误，一并修复：

1. addStringOption的回调未正确闭合，导致语法结构混乱
2. 存在英文拼写小错误（an user应为a user，不影响运行但不够规范）

修复后的完整代码：

const {SlashCommandBuilder, PermissionFlagsBits} = require('discord.js');

module.exports = {
    data: new SlashCommandBuilder()
     .setName('test')
     .setDescription('Test if everything is working.')
     .addSubcommandGroup((subcommandgroup) => 
        subcommandgroup
         .setName("user")
         .setDescription("Configure a user.")
         .addSubcommand((subcommand) => 
            subcommand
                .setName("role")
                .setDescription("Configure a user's role.")
                .setDMPermissions(false) // 将DM权限移至子命令层级
                .addUserOption((option) => 
                    option
                    .setName("user")
                    .setDescription("The user to configure.")
                )
         )
        .addSubcommand((subcommand) => 
            subcommand
                .setName("nickname")
                .setDescription("Configure a user's nickname.")
                .setDMPermissions(false)
                .addStringOption((option) => 
                    option
                    .setName("nickname")
                    .setDescription("The nickname the user should have.")
                )
                .addUserOption((option) => 
                    option
                    .setName("user")
                    .setDescription("The user to configure.")
                )
         )
        .addSubcommand((subcommand) => 
            subcommand
                .setName("message")
                .setDescription("Configure a message.")
                .setDMPermissions(false)
         )
     )
    .toJSON(),
    userPermissions: [PermissionFlagsBits.ManageMessages],
    botPermissions: [PermissionFlagsBits.Connect],

    run: (client, interaction) => {
        return interaction.reply("This is a test command.")
    }
};

关键修复点：

• 移除根命令上的.setDMPermissions(false)，将该方法添加到每个子命令的链式调用中
• 补全所有未闭合的回调括号，确保语法结构正确
• 修正拼写错误（可选，提升代码规范性）

修改后，命令注册时的TypeError会消失，代码也符合Discord.js的要求。

内容的提问来源于stack exchange，提问作者Juli