Pastable version of Help generating abbreviation from string

<pre class='prettyprint' language='ruby'>class Race &lt; ActiveRecord::Base
  
  before_validation :set_abbreviation
  
  # Associations
  has_one :employee
  
  # Validatioins
  validates_presence_of :name, :abbreviation
  validates_uniqueness_of :name, :abbreviation
  
  protected

# The method will generate an unambiguous abbreviatioin from the model's name attribute and assign it to the models abbreviation attribute
  def set_abbreviation
    
    name = self.name.to_s
    strnlength = name.size
    
    while strnlength &gt;= 3 do
      chop.name
      strnlength = name.size
    end

if name.size == 3
      self.abbreviation = name.capitalize
    else
      raise &quot;While loop failed to produce a viable abbreviation&quot;
    end

end
  
end</pre>
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Pastable version of Help generating abbreviation from string