It doesn't look like anyone has done a full or semi-fledged example of how to use BookshelfJS in something like Express.
Most examples have all the models in the same file. This obviously won't work well if you're dealing with a larger app. So here is an attempt at using BookshelfJS in such a manner.
In this example, I used a MySQL database with the following schema:
It's your classic Twitter clone, stripped down quite a bit.
We're not going to do a UI or validation. In fact, this example will only implement about half a REST API.
As you can see, we will have fairly standard one-to-many relationship and then a more complex many-to-many relationship via a join/bridge table.
An additional twist is the fact that both sides of the relationship are User models.
For clarity: In the Followers table, follower is the user ID of the user initiating the action while followee is the user ID of the person being acted upon. So when Alice follows Bob, Alice's ID is the follower and Bob's ID is the followee.
Okay - go look in src/app.js and read the comments.