Hi!

I'm creating a simple signup form where people can sign up for a camp. They
should be able to add a contact person and also sign up other people (such
as family members).

Two models:
Application
has_many :participants
accepts_nested_attributes_for :participants

Participant
belongs_to :application

I have some trouble with the contact person, which is also a participant. I
guess I should add something like this:

Application
has_many :participants
belongs_to :contact_person, :class_name => "Participant", :foreign_key =>
"contact_person_id"
accepts_nested_attributes_for :participants, :contact_person

Ok, so then I try to set up my nested form. In my
ApplicationsController#new method I do this:

def new
@application = Application.new
2.times { @application.participants.build }
1.times { @application.contact_person.build }
end

But that gives me an error: "undefined method `build' for nil:NilClass".
The error comes from: "@application.contact_person.build", so
contact_person is nil.


So, any ideas what I have done wrong? It was a while ago I fiddled with
nested forms like this...

Thanks!

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postedMar 31, '12 at 7:00p
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