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dmpopidor / db / migrate / 20170201194502_remove_region_group_and_add_super_region_id_to_regions.rb
@briley briley on 1 Feb 2017 271 bytes removed region_group (and underlying table) and replaced with has_and_belongs_to_many relationship on Region so that we can do region.super_region and region.sub_regions. Added unit tests for Region
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class RemoveRegionGroupAndAddSuperRegionIdToRegions < ActiveRecord::Migration
  def change
    drop_table :region_groups if table_exists?(:region_groups)
    
    add_column :regions, :super_region_id, :integer unless column_exists?(:regions, :super_region_id)
  end
end