Rails - Sep 2005 - :include doesn't respect :conditions of the included model

Hi all,

I have something like the following in my model(s)

class Person < ActiveRecord::Base
   has_many :planung

   has_one  :last_planung
            :class_name => "Planung",
            :conditions => "exist IS TRUE",
            :order => "date DESC"
end

class Planung < ActiveRecord::Base
   belongs_to :person
end

And the corresponding controller looks like

class PersonController < ApplicationController
   def index
     @person = Person.find(:all, :include => [:last_planung])
   end
end

The actual problem is that the :include of :last_planung doesn''t 
respect the :conditions of last_planung. I can''t find anything in the 
docs mentioning this problem.

Are there any solutions?

Any help appreciated

Sebastian