model.js

// Models
var Tenant = sequelize.define('Tenant', {
    'displayName': Sequelize.STRING
});

var App = sequelize.define('App', {
    'displayName': Sequelize.STRING,
    'hostname': Sequelize.STRING,
    'type': {
        'type': Sequelize.ENUM('timetable'),
        'allowNull': false
    },
    'enabled': {
        'type': Sequelize.BOOLEAN,
        'defaultValue': true
    }
},
{
    'instanceMethods': {
        // <snip>
    }
});

App.belongsTo(Tenant);
Tenant.hasMany(App);



// Logic
App.find({'where': {'hostname': 'timetable.cam.grasshopper.com'}, 'include': [Tenant]}).complete(function(err, app) {
    if (err) {
        console.log(err);
        return;
    }

    console.log(JSON.stringify(app, null, 4));
    /* Returns Tenant where I would expect tenant (note case)
     {
        "id": 1,
        "displayName": "Cambridge TimeTable",
        "hostname": "timetable.cam.grasshopper.com",
        "type": "timetable",
        "enabled": true,
        "createdAt": "2014-10-19T14:31:15.114Z",
        "updatedAt": "2014-10-19T14:31:15.123Z",
        "TenantId": 1,
        "Tenant": {
            "id": 1,
            "displayName": "Cambridge University",
            "createdAt": "2014-10-19T14:31:15.103Z",
            "updatedAt": "2014-10-19T14:31:15.103Z"
        }
    }
    */
});