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root / db / migrate / 20100313171051_add_index_on_issues_nested_set.rb @ 443:350acce374a2

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class AddIndexOnIssuesNestedSet < ActiveRecord::Migration
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  def self.up
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    add_index :issues, [:root_id, :lft, :rgt]
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  end
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  def self.down


    		
  

  

    
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    remove_index :issues, [:root_id, :lft, :rgt]


    		
  

  

    
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  end


    		
  

  

    
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end