On Fri, Feb 04, 2005 at 10:31:19AM -0800, Robert Brewer wrote:
> Jack Diederich wrote:
> > *ding*ding*ding* The biggest mistake I've made most
> > frequently is using
> > a database in applications. YAGNI. Using a database at all has it's
> > own overhead. Using a database badly is deadly. Most sites would
> > benefit from ripping out the database and doing something simpler.
> > Refactoring a database on a live system is a giant pain in the ass,
> > simpler file-based approaches make incremental updates easier.
> >
> > The Wikipedia example has been thrown around, I haven't looked at the
> > code either; except for search why would they need a database to
> > look up an individual WikiWord? Going to the database
> > requires reading
> > an index when pickle.load(open('words/W/WikiWord')) would
> > seem sufficient.
> >
> ...
> >
> > If there is interest I'll follow up with some details on my own LAMP
> > software which does live reports on gigs of data and - you
> > guessed it -
> > I regret it is database backed. That story also involves why
> > I started
> > using Python (the prototype was in PHP).
>
> I'd be interested, if only selfishly to hear more potential use cases
> for *my* projects. ;)
It would be long so I'll spin it into a blog piece. They seem to be
all the rage these days *0.5 wink*
> One of my goals for Dejavu* (my ORM) is to abstract persistence to the
> point that you can easily test your actual, live dataset against many
> potential storage mechanisms (i.e. multiple DB's, but also shelve,
> etc.). I need to finish the migration tools, but it's well on the way.
I just looked at the docs, looks like a nicer version of the homespun
one I use. If someone lends you the time machine set the year to 2001
and I'll use Dejavu instead. Reading the docs also makes me long for
class decorators (again). I use metaclasses to register tables to
databases, I see you inspect globals.
ex in a better world:
mydb = Database('foo')
@mydb.add_table
class Foo(Table):
col1 = int
col2 = str
@mydb.add_table
class Bar(Table):
foo_id = str
colb = unicode
*sigh* maybe in 2.5?
-Jack
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