view db/migrate/.svn/text-base/048_allow_null_version_effective_date.rb.svn-base @ 255:a7002a8f0eca feature_80

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class AllowNullVersionEffectiveDate < ActiveRecord::Migration
  def self.up
    change_column :versions, :effective_date, :date, :default => nil, :null => true
  end

  def self.down
    raise IrreversibleMigration
  end
end