openstack team mailing list archive

["Mark Washenberger" <mark.washenberger@xxxxxxxxxxxxx>]

The only thing I see that ties us to sqlalchemy is using the model objects directly. But I think there are actually three choices here: sqlalchemy objects, dicts, and regular objects. Well really there are four, if we include sqlalchemy objects that try to act like dicts :-). My preference order is:

1. regular objects (which is what I thought Kevin was talking about. . . maybe?)
2. regular dicts
3. a tie between sqlalchemy objects and sqlalchemy objects that try to behave like dicts

"Devin Carlen" <devin.carlen@xxxxxxxxx> said:

> Matt, that answer is simple: so we can use things other than sqlalchemy.
> 
> 
> 
> On Dec 15, 2011, at 10:35 AM, 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@xxxxxxxxxxx> wrote:
>>
>>> On Thu, Dec 15, 2011, Kevin L. Mitchell <kevin.mitchell@xxxxxxxxxxxxx>
>>> wrote:
>>>>     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?
>>>
>>> JE
>>>
>>>
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>>
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