Hi Mike,
Thank you very much. A thousand years and I still wouldn't be able to
figure that one out.
And thank you also for clarifying use of Comparators - makes coding simpler
with expression instead.
Thanks,
George
On Saturday, 20 November 2021 at 00:28:00 UTC+11 Mike Bayer wrote:
>
there's no need to use custom Comparator objects, these are difficult to get
right and there's not really any need to use them except in the extremely
unusual case that you need specific SQL operators to do something different,
which itself is not really a thing in modern SQLAlchemy.
Just use
heya -
haven't run it yet but if you are on SQLAlchemy 1.3, the signature for case()
is different (sorry, note the list ):
https://docs.sqlalchemy.org/en/13/core/sqlelement.html?highlight=case#sqlalchemy.sql.expression.case
expr = case(
[(cls.Type == "SELL", cast(cls.Units *
Hi All,
Sorry About my previous post - did not read the posting Guidelines.
Using Sqlalchemy 1.3.23
In this example using SQLlite memory, but is also happening in Postgresql
12.9
class TotalCostComparator(Comparator):
def __init__(self, cls):
expr = case(
(cls.Type ==
Hi All,
Using Sqlalchemy 1.3.23
I am getting a NotImplementedError: Operator 'getitem' is not supported on
this expression
when sorting on some hybrid_properties.
I have attached a sample code to replicate it.
falls over with the following traceback:
Traceback (most recent call last):
File
