Ruby on Rails

I have been up all night trying to solve this same problem, and I
finally got it to work.

I'll use your tables to demonstrate what I did::

===================================
class Room < ActiveRecord::Base
belongs_to :roomtype
end

class Roomtype < ActiveRecord::Base
has_many :rooms,
:primary_key => "t_name",
:foreign_key => "type_name"
end
===================================

I tried this oh-so-many different ways, and the solution was as simple
as this. Ideally, I would prefer to set the tables up so that they all
receive the built-in Rails magic, but we have some legacy business logic
where I can only relate some of the data we import (let's say we import
it into "Room") on an old field that's a string datatype.

It's so great to see this working. I am able to write methods in my
model, and use it in web pages.

I hope this helps someone!

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