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class Tagging
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include Mongoid::Document
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include Mongoid::Timestamps
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field :to_destroy, default: false
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belongs_to :tag
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belongs_to :taggable, polymorphic: true
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before_destroy :update_taggable_tag_ids
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private
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def update_taggable_tag_ids
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self.taggable.remove_id(self.tag.id)
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end
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end |