db/migrate/20201008184053_add_dewey_id_to_categories_and_sections.rb


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class AddDeweyIdToCategoriesAndSections < ActiveRecord::Migration[6.0]
  def change
    add_column :categories, :dewey_id, :integer
    add_column :sections, :dewey_id, :integer
    add_index :categories, :dewey_id, unique: true
    add_index :sections, :dewey_id, unique: true
  end
end