ruby - Rails 3 add virtual attribute dynamically -

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My setup: Rail 3.0.9, Ruby 1.9.2

I have reasons to do this But what I need is a way to dynamically add a virtual characteristic to an active sequence of results. This means that I am not using attr_accessor in the model and instead want to dynamically add virtual features to one result.

For example, 

  user = user. A # user has the following features: Name, Email, Password   
 What do I like to say Add (without using  attr_accessor ) a virtual characteristic  status  to  user , is it possible?   
 
 
 You should do this:  
  users.each do | User | User.instance_eval DRF status example_variable_get ("@ position") end DEF status = (val) instance_variable_set ("@ position", val) end and end

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