Excluding self from one_to_many

[Wardrop]

This seems like it should be obvious.

Let's say I have a "Cars" table/model and I want have a one_to_many named "other_cars" that gets every other car but excludes the current car record. How does one do that exactly? I normally use the ":conditions" option to filter out unwanted records, but given the current record isn't something I can statically define, I'm not sure how to go about this.

[jeremyevans]

You can use the :dataset association option for this:

class Car < Sequel::Model
  one_to_many :other_cars, class: self, dataset: proc{|r| r.associated_class.exclude(id: id)}
end

[Wardrop]

Excellent, thanks very much. I was going through all the association doco's and did see that dataset option but just wasn't sure what the most appropriate or elegant method was.