Foxy Fixtures and Polymorphism not running properly

Rails
1

I would like to hear ideas about a problem I’m having with testing a
controller from a model that uses polimorphism. It seems that the
fixture do not recognize the relationship. Did you see errors in these
files? The error I get is:

/***** ERROR *****/

  1. Error:
    test_should_show_ingreso(IngresosControllerTest):
    ActionView::TemplateError: You have a nil object when you didn’t expect
    it!
    The error occurred while evaluating nil.nombre
    On line #18 of app/views/ingresos/show.html.erb

    15:
    16:


    17: Origen
    18: <%=h @ingreso.origen_type %>: <%= @ingreso.origen.nombre
    %>
    19:


    20:
    21:

    app/views/ingresos/show.html.erb:18
    app/controllers/ingresos_controller.rb:86:in show' /test/functional/ingresos_controller_test.rb:32:intest_should_show_ingreso’
    c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:34:in run' c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:33:ineach’
    c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:33:in run' c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:34:inrun’
    c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:33:in each' c:/ruby/lib/ruby/1.8/test/unit/testsuite.rb:33:inrun’
    c:/ruby/lib/ruby/1.8/test/unit/ui/testrunnermediator.rb:46:in
    run_suite' c:/ruby/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:67:instart_mediator’
    c:/ruby/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:41:in
    start' c:/ruby/lib/ruby/1.8/test/unit/ui/testrunnerutilities.rb:29:inrun’
    c:/ruby/lib/ruby/1.8/test/unit/autorunner.rb:216:in run' c:/ruby/lib/ruby/1.8/test/unit/autorunner.rb:12:inrun’
    c:/ruby/lib/ruby/1.8/test/unit.rb:278
    rake (0.8.7) lib/rake/rake_test_loader.rb:5

/***** clientes.yml *****/
jack:
NIF: B98654321
nombre: Jack

/***** ingresos.yml *****/
primero:
origen: jack (Cliente)

/***** cliente.rb *****/
class Cliente < ActiveRecord::Base
has_many :ingresos, :as => :origen
end

/***** ingreso.rb *****/
class Ingreso < ActiveRecord::Base
belongs_to :origen, :polymorphic => true
end

/***** test_ingresos_controller.rb *****/
test “should show ingreso” do
get :show, { :id => ingresos(:primero).to_param }, { :usuario_id =>
usuarios(:fulanito).id }

assert_response :success

end

/***** views/ingresos/show.html.erb

Origen <%=h @ingreso.origen_type %>: <%= @ingreso.origen.nombre %>

Any help will be appreciated. Thanks in advance.