annotate db/migrate/.svn/text-base/048_allow_null_version_effective_date.rb.svn-base @ 394:7ba3ba2a0f63 feature_135

Make the Research Description description more descriptive (see #135)

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