Rails - Dec 2007 - Problem with two relationships to the same table

Hi all,

When I try to save a form with two collection_select I get this error:

 ActiveRecord::AssociationTypeMismatch in InscripcionController#create
Profesion expected, got String

I think that the relationship between elements is well defined, but in
this case I have two relationships leading to the same table (one for
the father and one for the mother):

class Profesion < ActiveRecord::Base
  has_many :titulars_padre, :class_name=> "Titular", :foreign_key
=>
"profesion_padre_id"
  has_many :titulars_madre, :class_name=> "Titular", :foreign_key
=>
"profesion_madre_id"
end

class Titular < ActiveRecord::Base
  has_many :alumnos
  belongs_to :profesion_padre, :class_name=> "Profesion",
:foreign_key
=> "profesion_padre_id"
  belongs_to :profesion_madre, :class_name=> "Profesion",
:foreign_key
=> "profesion_madre_id"
end

I get the error when the execution reach this point:
     t=Titular.new(params[:titular])

The params of the request are:

Request
Parameters: {"commit"=>"Create",
"titular"=>{"profesion_padre"=>"10",
"profesion_madre"=>"4"}}

Thanks in advance
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Rakoon Smith wrote:
>  ActiveRecord::AssociationTypeMismatch in InscripcionController#create
> Profesion expected, got String
> ...
>   belongs_to :profesion_padre, :class_name=> "Profesion",
:foreign_key
> => "profesion_padre_id"
>   belongs_to :profesion_madre, :class_name=> "Profesion",
:foreign_key
> => "profesion_madre_id"
> end
> 
> I get the error when the execution reach this point:
>      t=Titular.new(params[:titular])
> 
> The params of the request are:
> 
> Request
> Parameters: {"commit"=>"Create",
"titular"=>{"profesion_padre"=>"10",
> "profesion_madre"=>"4"}}
The select helpers in your view should be

<%= select :titular, :profesion_padre_id %> and
<%= select :titular, :profesion_madre_id %>, not
<%= select :titular, :profesion_padre %> and
<%= select :titular, :profesion_madre %>.

-- 
We develop, watch us RoR, in numbers too big to ignore.


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