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19 lines
350 B
Ruby
19 lines
350 B
Ruby
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# The Tagging join model.
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class Tagging < ActiveRecord::Base
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attr_accessible :taggable_id, :tag, :taggable_type
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belongs_to :tag
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belongs_to :taggable, :polymorphic => true, :touch => true
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after_destroy :delete_orphaned_tag
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private
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def delete_orphaned_tag
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tag.destroy if tag and tag.taggings.count == 0
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end
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end
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