Complex join
You can provide a function as the second argument to get a join
builder for creating more complex joins. The join builder has a
bunch of on* methods for building the on clause of the join.
There's basically an equivalent for every where method
(on, onRef etc.).
You can do all the same things with the
on method that you can with the corresponding where method (like OR expressions for example).
See the where method documentation for more examples.
More examples
The API documentation is packed with examples. The API docs are hosted here but you can access the same documentation by hovering over functions/methods/classes in your IDE. The examples are always just one hover away!
For example, check out these sections: