[std.database] ORM

[bls]

Am 12.10.2011 20:13, schrieb Steve Teale:
> The way this discussion is going we're going to have four layers, with
> the top one written by Jacob.

1 = etc.c.
2 = Database classes
3 = ??
4 = ORM

Please explain ?

>
> I'm lost with this ORM stuff, and I suspect that the vast majority of D
> users would feel the same.


IMO, SQLAlchemy (Python) is a very clean and powerful ORM. Easy to use 
and provides the _Data Mapper_ pattern (not everybody is enthusiastic 
about the Active Record pattern) as well as the _Unit Of Work_ pattern.

The UOW pattern organizes pending insert/update/delete operations into 
queues and flushes them all in one batch. (All or nothing way, in other 
words transactional.

just in case : http://www.sqlalchemy.org/docs/orm/tutorial.html