With column names

gistfile1.js

/**
* ListingEvent.js
*
* @description :: TODO: You might write a short summary of how this model works and what it represents here.
* @docs        :: http://sailsjs.org/#!documentation/models
*/

module.exports = {

    tableName: 'listingEvent',

    attributes: {
        name: { type: 'string' },
        timeZone: { type: 'string' },
        tzOffset: { type: 'string' },
        slug: { type: 'string' },
        start: { type: 'string' },
        end: { type: 'string' },
        eventInstanceSlug: { type: 'string' },
        location: {
            model:'location',
            columnName:'locationId'
        },
        eventInstance: {
            model:'eventInstance',
            columnName:'eventInstanceId'
        },
        artist: {
          model: 'artist',
          columnName:'artistId'
        },
        users: {
            collection: 'user',
            via: 'listingEvents'
        },
        artistSlug: function(){
          return this.artists[0].slug;
        }
    }
};