Rails - Oct 2006 - dynamic class methods and attributes

I have a class Form that represents a form that a user fills in
The elements on the form are determined through the app and they can be 
any type of form field, file, select, text, textarea etc..

# a collection of fields on a form
class Form < ActiveRecord::Base
 has_many :elements
end

# the individual elements of a form
class Element
 belongs_to :form
end

# refers to an instance of a form as filled in by a user
class FormProfile
 has_many :form_element_answers
 belongs_to :form
 belongs_to :user
end

# each individual elements answer by a user
class FormElementAnswer
 belongs_to :form_profile
end

When displaying the form to a user the Form object is found then all of 
its elements are looped through and displayed on the page with the right 
type of input element.

When they save their answers the controller loops through each object in 
params and creates a FormElementAnswer row which corresponds to the 
FormProfile for that user.

Now I was wondering if there was a simple way of setting up FormProfile 
to somehow dynamically know what elements are on that form.  So instead 
of looping through params and creating a row for each FormElementAnswer 
I could just do FormProfile.new(params[:whatever]) and it takes care of 
all the work itself in the model.

This way validation would be on FormProfile and not on each individual 
FormElementAnswer.

Maybe it would dynamically allocate getters and setters for each element 
of the form on FormProfile itself?

Not sure if this clear?

-- 
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