rails controller instance var is cached if initialy assigned to const

wtf.rb

class FooController < ApplicationController

  KONST = {
    foo: { bar: 'baz' },
  }

  def show
  @konst = KONST
  end

end

# --- in View: ---

# :ruby
  konst = @konst.map do |key, value|
    value[baz] = 'oops'
    [key, value]
  end.to_h