jzellman

# Wrong!
# If foo is valid but bar is not, foo is still saved.
# This breaks the transactional nature
#
def create
  Foo.transaction do
    @foo = Foo.create(params[:foo])
    @bar = Bar.create(params[:bar])
    if @foo.save and @bar.save
      redirect_to some_url

jzellman

for i in $(find db/migrate |grep mondrian |cut -d '/' -f 3 | cut -d '_' -f 1 )
do
rake db:migrate:down VERSION=$i
rake db:migrate:up VERSION=$i
done

rake mondrian:init

jzellman

class Device
  validates_uniqueness_of :device_number, :scope => :customer_id

  after_create: assign_device_number

  def assign_device_number
    begin 
      device_number = self.customer.devices.map(&:device_number).compact.max) || 0  + 1
      save!
    rescue Whatever gets thrown for validation error

jzellman

class Device
  # ...
  def friendly_name
   "#{self.customer.device_name_prefix} #{self.device_number}"
  end 
end