On 17 July 2013 21:18, Jonathan Slenders wrote:
> This is really nice. Both have their use cases, but I'm prefering the
> second when possible, because it's much more flexible and preserves
> database consistency.
> With the same efford you can make the following work:
>
> ProductEntry.objects.fil
Oh, and denormalisation is not necessarily faster. If you're able to
express the value of the column as an SQL expression, it's possible to put
an index on such an expression.
Le mercredi 17 juillet 2013 13:18:16 UTC+2, Jonathan Slenders a écrit :
>
> This is really nice. Both have their use ca
This is really nice. Both have their use cases, but I'm prefering the
second when possible, because it's much more flexible and preserves
database consistency.
With the same efford you can make the following work:
ProductEntry.objects.filter(lambda p: p.onpurchase_price * p.quantity
== 5000.0)
I'm going to suggest that a virtual field and a materialized field are
slightly different concepts, and porblaly have different internals. The
former requires some hooks in the ORM, the latter is really just some nice
wrapping around existing hooks.
In any event there's probably some overal with t
On Tue, Jul 16, 2013 at 8:04 PM, Russell Keith-Magee <
russ...@keith-magee.com> wrote:
> So - functionally, what you describe can be done. What's missing is
> someone to polish the concepts into a patch for inclusion into Django's
> repository. If this is something that interests you - get hacking
On Wed, Jul 17, 2013 at 4:02 AM, Luis Francisco Jesus Masuelli Bonanni <
endless.l...@gmail.com> wrote:
> A feature I would really appreciate (as devs in
> http://stackoverflow.com/questions/12217763/does-django-orm-have-an-equivalent-to-sqlalchemys-hybrid-attribute,
> at least) is the Hybrid Prop
A feature I would really appreciate (as devs in
http://stackoverflow.com/questions/12217763/does-django-orm-have-an-equivalent-to-sqlalchemys-hybrid-attribute,
at least) is the Hybrid Property feature present in SQLAlchemy. They would
really contribute to DRY principle.
In django this would al
