From: Tom Sawyer <transami@...>
Date: 2002-08-28T17:41:58+09:00
Subject: Re: Distributed Object Container

On Wed, 2002-08-28 at 02:04, Philipp Meier wrote:
> I recently stumbled over OJB (http://jakarta.apache.org/ojb/) which is a
> object relational bridge including a ODMG 3.0 complient API. Although I
> didn't tried it yet I think something like that is missing for ruby. Of
> course, the API must be ruby like. The concept of blocks in ruby would
> be great for transaction demarkation (sic?), e.g. I imagine writing db
> access or generally access to persistent object like this:
> 
> def add_item_to_cart(item_ids)
> 	transaction.serializable do
> 		@warehouse.queryByValue(:id, item_ids) do |item|
> 			item.instock -= 1
> 			@cart[@item] += 1
> 		end
> 	end
> end

while your example is bit more then i have yet provided, if your are
interested in being able to move you objects in and out of a database
with minimal fuss, i have created DBize (soon to be released as well) it
is primarily a mixin module that makes an object instantly
"relationable". it also provides for subrecords (i.e. many-to-one table
relationships).

~transami