view db/migrate/048_allow_null_version_effective_date.rb @ 791:b5e8049ded56 feature_14

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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