Dfyjkt

I'm trying to make a 'userinfo' command, and I'm currently stuck on showing roles of the user.

Here's my code:

const Discord = module.require('discord.js');
const moment = require('moment');

module.exports.run = async (bot, message, args) => 

 let user = message.mentions.users.first() 

module.exports.help = 
 name: 'userinfo'

I'm getting error TypeError: Cannot read property 'map' of undefined and I don't know how to fix it.
Thanks for help. <3

User.roles is undefined because that property doesn't exist: try using GuildMember.roles instead:

let member = message.mentions.members.first() || message.member,
 user = member.user;

let embed = new Discord.RichEmbed()
 // ... all the other stuff ...
 .addField('Roles:', member.roles.map(r => `$r`).join(' | '), true)

The other properties will still use user, but .roles will be related to the GuildMember.

TypeError: Cannot read property 'map' of undefined - this means that somewhere in your code happening a situation of execution .map function of undefined variable.

You have only one map. Here:

 .addField('Roles:', user.roles.map(r => `$r`).join(' | '), true)
 // ^^^

This line trows this error, so this means that user.roles is undefined.

Try to:

let user = message.mentions.users.first() || message.author;
console.log(user.roles); // it is undefined

Propably user.roles is undefined.

If it's ok that user has no roles, you can replace:

.addField('Roles:', user.roles.map(r => `$r`).join(' | '), true)

with:

.addField('Roles:', user.roles ? user.roles.map(r => `$r`).join(' | ') : "", true)

This will set empty string in case when there's no roles property in user object.

Another option is to set user.roles to empty array if it doesn't exist (or do something else in this if, i.e. throw error):

let user = /* get user*/
if (!user.roles)
 user.roles = ;