Problems with testing, foxy fixtures and polymorphism


I'm using Rails version 2.3.2 but it seems that my fixtures are wrong and when testing a relation among two models does not appear. I have no problems executing the application, only with tests.

These are my fixtures:

/***** ingresos.yml *****/ primero:   origen: jack (Cliente)   tipo: Banco   fecha: 2009-06-05   cantidad: 10

/***** clientes.yml *****/ jack:   nombre: Jack Sephard

The error (The error ocurred while evaluating nil.nombre) is in this line:

/***** show.html.erb *****/ <%=h @ingreso.origen_type %>: <%= @ingreso.origen.nombre %>

The models are these:

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

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

Any idea will be appreciated. Thanks in advance.