I have a legacy app that is implemented using the following model 
(currently in rails, but i want to port it to sequel):

class Person < Sequel::Model
 one_to_one :parent

 def grand
  parent.parent
 end
end

class Parent < Sequel::Model
 one_to_one :parent, :class=>:Grand
end

class Grand < Sequel::Model
end

The thing is that I just need to access a handful of columns in the grand 
table so using model seems a bit overkill. Is there a better way I can just 
join the grand table as association without having to define the classes 
(Parent and Grand are not really being used)?

This is what I really want:
select
grand.name as "GrandParent Name"
, ...
from
person
inner join parent on parent.id = person.parent_id
inner join grand on grand.id = parent.parent_id

Thanks
Roy

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