GuildChannel.permissionsFor(user) returns null with all caches enabled

[KevinNovak]

When using the GuildChannel.permissionsFor(), null is returned.

Example:

const Discord = require('discord.js-light');
const client = new Discord.Client({
    cacheGuilds: true,
    cacheChannels: true,
    cacheOverwrites: true,
    cacheRoles: true,
    cacheEmojis: true,
    cachePresences: true,
});

const MY_TOKEN = '{INSERT_TOKEN_HERE}';

(() => {
    client.on('message', msg => {
        if (msg.content.toLowerCase() !== 'test') {
            return;
        }

        // This comes back null
        let authorPerms = msg.channel.permissionsFor(msg.author);

        // This will fail because the above is null
        let authorIsAdmin = authorPerms.has('ADMINISTRATOR');

        msg.channel.send(authorIsAdmin ? 'You are an admin!' : 'You are not an admin!');
    });

    client.login(MY_TOKEN);
})();

[timotejroiko]

Hey there,

it fails because msg.author resolves to a user ID, and then looks into the member cache to find a matching ID but there is none since members are not cached automatically. You can however use .permissionsFor(msg.member) instead which takes the member instance directly from the message and bypasses the cache.

[KevinNovak]

Thank you for the explanation, I saw that about members not being cached automatically but didn't put it together. I'll mark this as closed.