On 01.02.2009, at 1:49, Bryan wrote:

> OR have a FeedIten model that has a yaml property that contains the
> data related to that feed item:
>
> class FeedItem
>  include DataMapper::Resource
>  property :user_id, Integer #user who performed the action
>  property :feed_item_class, Class
>  property :feed_item_id, Integer
>  property :data, Yaml
> end


This is "poor man's document database on top of relational database"  
and works nicely for cases like activities where
objects may be of 10, 20 and more types, thus schema gets in your way.  
So I'd recommend that.

MK


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