view db/migrate/048_allow_null_version_effective_date.rb @ 1194:6676c0284df2 feature_564

Add "mature projects" box. This isn't good enough on its own, it's just a test -- we need this to inform other relationships

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