Thanks, I think that's exactly what I was looking for!
.oO V Oo.
On 12/28/2011 06:10 PM, Michael Bayer wrote:
On Dec 27, 2011, at 8:37 PM, Vlad K. wrote:
Hi all.
I need to select some rows where pkey is in a sequence. How do I order by that
very sequence?
images_all =
session.query(AdImage).filter(AdImage.image_id.in_(images)).order_by( ?
).all()
Postgresql backend.
typically with case():
order_by(
case([
(Adimage.id == 3, "A"),
(Adimage.id == 1, "B"),
(Adimage.id == 9, "C"),
])
)
unless you can use a simpler transformation on AdImage.id that converts it into
a sortable value.
The above can be generalized:
case([(AdImage.id == value, literal(index)) for index, value in
enumerate(images)])
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