[Openstack] using objects returned from DB layer
rick.harris at rackspace.com
Thu Dec 15 20:02:26 UTC 2011
For me, it's not one particular notation versus the other, I'd be happy with either--it's having both. It just needlessly complicates things.
> Now we're complaining that the ORM we likely aren't using
> correctly isn't working for us
I don't think anyone is complaining that the *ORM* is at fault here. We're just complaining that our abstraction is leaky, and since we went through all of the trouble to have this DB API indirection, we may as well seal it up so we can eventually support other data stores.
As it stands now, we have all of the complexity of abstraction without any of the benefits.
On Dec 15, 2011, at 12:35 PM, Matt Dietz wrote:
> I have to confess to being confused here. We deliberately chose
> sqlalchemy. Then we mapped everything away so it didn't look like the ORM
> in question when in reality, we partially took some of said ORM's job away
> from it. Now we're complaining that the ORM we likely aren't using
> correctly isn't working for us. In short, we chose to use an ORM, and now
> we're complaining about the O
> I'm not seeing what taking everything to a dictionary-centric model buys
> us, and I also don't see anyone actually justifying it. Can we get some
> actual examples of why one approach is better than the other?
> On 12/15/11 10:54 AM, "Johannes Erdfelt" <johannes at erdfelt.com> wrote:
>> On Thu, Dec 15, 2011, Kevin L. Mitchell <kevin.mitchell at rackspace.com>
>>> 2. However, I violently disagree with the idea that the DB layer
>>> must return dicts. It does not, even if you start talking about
>>> allowing use of other kinds of databases. We can, and should,
>>> wrap these things in objects, upon which we can call methods
>>> that do things‹i.e., we should, you know, actually use
>>> object-oriented programming.
>> What kinds of things?
>> I'm not against returning back a standardized object that provides
>> __getattr__ so we don't have to use dict notation. Any database backend
>> can do something similar easily.
>> I'm just trying to better understand what is object-oriented about the
>> data returned from a database? What methods would we want to use?
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