Rails core - Nov 2011 - has_one association problem together with Object method override

Hi,

I came across a peculiar problem with has_one association in
combination with an Object method override. Can somebody explain to me
what is going on?

Here is how it goes:

I have a ''has_one'' relationship between Supplier and Account,
like in
the example of the has_one example used in Rails Guides.

Supplier:

class Supplier < ActiveRecord::Base

  validates :name, :presence => true

  has_one :account

  nilify_blanks
end

Account:

class Account < ActiveRecord::Base

  belongs_to :supplier

  validates :supplier_id, :presence => true

  nilify_blanks

  def foo
    puts ''in account''
  end

  def to_s
    puts ''in account''
  end

end

I also have a method foo on Object as follows:

class Object
  def foo
    puts ''in object''
  end
end

When I call:

Supplier#account#to_s I get ''in account''

When I call:

Supplier#account#foo I get ''in object''

whereas I would expect it to print ''in account''

Does anybody have any clue why does this happen? Is this a bug in
Rails ActiveRecord?

Thanks in advance
P.S. If you want, you can get a full fledged application that
demonstrates the problem from here:

git://github.com/pmatsinopoulos/test_association_and_object_method_override.git


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