redmine/db/migrate/067_create_wiki_redirects.rb

class CreateWikiRedirects < ActiveRecord::Migration[4.2]
  def self.up
    create_table :wiki_redirects do |t|
      t.column :wiki_id, :integer, :null => false
      t.column :title, :string
      t.column :redirects_to, :string
      t.column :created_on, :datetime, :null => false
    end
    add_index :wiki_redirects, [:wiki_id, :title], :name => :wiki_redirects_wiki_id_title
  end

  def self.down
    drop_table :wiki_redirects
  end
end