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gistfile1.rb
Ruby
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class List < ActiveRecord::Base
acts_as_list :order => :position
validates_presence_of :name, :link
validates_numericality_of :position, :only_integer => true , :allow_nil => false
 
protected
def validate
if position < 1
errors.add(:position , " must be greater than 0")
end
end
end

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