DataMapper - some tiny issues within 0.9.9

I am working on a home-grown authorization system. It is very customized for our special requirement. I have to hack DataMapper to get the job done. The more I dig in DM, the more I love it. I can't imagine how much code I have to write to do the same thing if I do it with Java. As a relative new ORM framework, it sure has some corners that might not work well for you, following are some thing I found out in one day:

1. auto_migrate! vs. auto_upgrade!

	class Employee
	include DataMapper::Resource
	property :id, Serial
	property :name, String
	...
	end
	class Manager < Employee
	property :position, String, :default => 'manager'
	...
	end
	Manager.auto_migrate!
	the table will have following columns:
	id
	name
	Manger.auto_upgrade!
	the table will have following columns:
	id
	name
	position

view raw dm_migrate_upgrade.rb hosted with ❤ by GitHub