On 05/23/2016 10:12 AM, Brian Cherinka wrote:
Hi,
It seems like the ARRAY option zero_indexes=True is broken for
2-dimensional arrays. Is this a bug that is fixed in 1.1? I'm
actually using the subclass ARRAY_D as a fix for the __getitem__
indexing. It works for 1-D arrays.
if you're passing zero_indexes=True then that needs to be propagated to
the new ARRAY type being created inside of __getitem__. The recipe
appears to miss this.
class ARRAY_D(ARRAY):
class Comparator(ARRAY.Comparator):
def __getitem__(self, index):
super_ = super(ARRAY_D.Comparator, self).__getitem__(index)
if not isinstance(index, slice) and self.type.dimensions > 1:
super_ = type_coerce(
super_,
ARRAY_D(
self.type.item_type,
dimensions=self.type.dimensions - 1,
zero_indexes=self.type.zero_indexes)
)
return super_
comparator_factory = Comparator
*1-D array*
wave = Column(ARRAY_D(Float, zero_indexes=True))
SQL
|
selectw.wavelength[17]fromdatadb.wavelength asw;
wavelength
------------
3634.96
(1row)
|
ORM - instance and class side
|
wave =session.query(datadb.Wavelength).first()
wave.wavelength[16]
3634.96
session.query(datadb.Wavelength.wavelength[16]).one()
(3634.96)
|
*2-D array*
value = Column(ARRAY_D(Float, dimensions=2, zero_indexes=True))
SQL
||
|
selecte.value[17][18]from dapdb.emline ase limit 1;
value
-------------------
4.962736845652115
|
ORM - instance and class side
||
|
# correct value on instance side
emline=session.query(dapdb.EmLine).first()
emline.value[16][17]
4.962736845652115
# expected correct indexing - wrong value
session.query(dapdb.EmLine.value[16][17]).first()
(4.8138361075679565)
# both "1-indexed" - wrong value
session.query(dapdb.EmLine.value[17][18]).first()
(5.380134788537585)
# first index is correct, but second is incremented by 1 - correct value
session.query(dapdb.EmLine.value[16][18]).first()
(4.962736845652115)
|
Cheers, Brian
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