ignore column in active record

gistfile1.rb

class User < ActiveRecord::Base
  @@ignore_attr = ['lname']
  def arel_attributes_values(include_primary_key = true, include_readonly_attributes = true, attribute_names = @attributes.keys)
    attrs = super(include_primary_key, include_readonly_attributes, attribute_names)
    attrs.delete_if {|key,value| @@ignore_attr.include?(key.name) }
    puts attrs.inspect
    attrs
  end 
end