annotate db/migrate/048_allow_null_version_effective_date.rb @ 231:5d6e2819f3dd cannam-pre-20110113-merge

Merge from branch "feature_20".  This initial implementation of #20 has been tested, but needs to be tested again in the proper context.

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