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adamaig/gist:223816

Forked from anonymous/gist:223815
Created November 2, 2009 00:20
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gistfile1.rb
class Tag < ActiveRecord::Base
belongs_to :taggable, :polymorphic => true
validates_uniqueness_of :tag, :scope => [:taggable_type, :taggable_id]
def self.tag_with(owner_object, *tags)
(tags - owner_object.tags.collect {|x| x.tag}).collect do |tag|
Tag.create( :taggable => owner_object, :tag => tag )
end
end
end
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