Factory_girl factory gem: problem with simple associations

Hi,

Can anyone familiar with the use of factory_girl please comment on why
I don’t succeed with the following:

has_one_instance = Factory.build(:has_one_class)
assert_equal 10, has_one_instance.belongs_to_class.some_attribute

…when I’ve constructed the relevant factories, as follows:

Factory.define :belongs_to_class do |f|
f.some_attribute 10

f.association :has_one_class, :factory => :has_one_class
end

Factory.define :has_one_class do |f|

end

…and the model classes have the indicated belongs_to:has_one
relationship?

(A further complicating factor may be the peculiar warning message I’m
getting post-factory_girl install: Warning:
Gem::Dependency#version_requirements is deprecated and will be removed
on or after August 2010. Use #requirement)

Thanks for any comment,

Grar

No takers, huh?