Bookshelf.js accessing multiple tables that are related - bookshelf.js

Question

I'm dealing with three tables.
Right now I can get the feed of a user (activities table) and activityTypes object (id,type from activitytypes table), but I also need to get related_user (users table) object of a given activity, so I'll know the details of the related_user if the column isn't empty.
users
id
email
username
password_hash
activitytypes
id
type
activities
id
user_id (foreign key from users, owner of the activity)
status
activitytype_id (foreign key from activitytypes)
related_user (foreign key from users.
Shows relation with the user_id, if there's any.
if activitytype_id is 2 or 3, this will be shown as "followed, "commented", etc.)
My models
var activityType = db.Model.extend({
tableName: 'activitytypes',
hasTimestamps: false
});
var activity = db.Model.extend({
tableName: 'activities',
hasTimestamps: true,
activityTypes: function() {
return this.belongsTo(activityType);
}
});
var user = db.Model.extend({
tableName: 'users',
hasTimestamps: true,
feed: function() {
return this.hasMany(activity);
}
});
This is my existing query, how can I add related_user object to it?
user.where({id : 43}).fetchAll({withRelated : ['feed.activityTypes']}).then(function(data) {
data = data.toJSON();
res.send(data);
});

Answer 1

I solved it.
I added a new method to activity, like below.
userRelated : function() {
return this.belongsTo(user,'related_user');
}
And here's the updated query. I don't know whether it's the right way or not in terms of optimization, but it works.
user.where({
id: 43
}).fetchAll({
withRelated: ['feed.userRelated', 'feed.activityTypes']
}).then(function(data) {
data = data.toJSON();
res.send(data);
});
Right now feed, userRelated and activityTypes return without a problem, everything is in data in JSON format.