Rails - Feb 2014 - Is Array constants in the model can be changed during runtime?

Hello everyone!

 

I have strange problem. Here is the code: 

 

model: 

 

class ItServiceJob < ActiveRecord::Base
TYPES = [["Important", 0], ["Not important", 1],
["SERGEY", 2]]

belongs_to :userend

view (haml): 

 

  %div{:role => "main", :class => "ui-content"}
    - job_types = ItServiceJob::TYPES
    - job_types.pop if (!can?(:manage, :it_service) || !can?(:born, :sergey))
    = job_types
    = form_for ItServiceJob.new, url: "#" do |f|
      
      %p
        = f.label :type
        = f.select :type, job_types

Now, when I refresh the page every time, the array pops one by one item and 
finally get empty! But, why? Why the constant changes, not variable? What 
I'm doing wrong?

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