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view db/migrate/20100313132032_add_issues_nested_sets_columns.rb @ 582:7cca1ac03f0c feature_36

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author Chris Cannam <chris.cannam@soundsoftware.ac.uk>
date Wed, 10 Aug 2011 17:19:36 +0100
parents 513646585e45
children cbb26bc654de
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class AddIssuesNestedSetsColumns < ActiveRecord::Migration
  def self.up
    add_column :issues, :parent_id, :integer, :default => nil
    add_column :issues, :root_id, :integer, :default => nil
    add_column :issues, :lft, :integer, :default => nil
    add_column :issues, :rgt, :integer, :default => nil
    
    Issue.update_all("parent_id = NULL, root_id = id, lft = 1, rgt = 2")
  end

  def self.down
    remove_column :issues, :parent_id
    remove_column :issues, :root_id
    remove_column :issues, :lft
    remove_column :issues, :rgt
  end
end