Those methods aren't part of the contract at the moment but I can add them in.
On Sep 4, 2012, at 10:30 AM, Eric Lemoine wrote:
> Hi
>
> I'm trying to add __lshift__ and __rshift__ to my (now well known :)
> Geometry's comparator_factory, but it looks like SQLAlchemy isn't
> happy with it.
>
>
>
> ----
> from sqlalchemy.types import UserDefinedType
>
>
> class Geometry(UserDefinedType):
>
> class comparator_factory(UserDefinedType.Comparator):
>
> def __lshift__(self, other):
> return self.op('<<')(other)
>
> def __rshift__(self, other):
> return self.op('>>')(other)
>
>
> from sqlalchemy import Table, Column, MetaData
>
> lakes = Table('lake', MetaData(),
> Column('geom', Geometry)
> )
>
> to_left_expr = lakes.c.geom << 'POINT(1 2)'
> to_right_expr = lakes.c.geom >> 'POINT(1 2)'
> ----
>
>
>
> This is the traceback:
>
> Traceback (most recent call last):
> File "comparator_factory.py", line 21, in <module>
> to_left_expr = lakes.c.geom << 'POINT(1 2)'
> TypeError: unsupported operand type(s) for <<: 'Column' and 'str'
>
>
> Is it me doing something wrong, or is SQLAlchemy just not dealing with
> << and >> for the moment? FYI, __add__ works just fine.
>
>
> Thank you.
>
>
> --
> Eric Lemoine
>
> Camptocamp France SAS
> Savoie Technolac, BP 352
> 73377 Le Bourget du Lac, Cedex
>
> Tel : 00 33 4 79 44 44 96
> Mail : eric.lemo...@camptocamp.com
> http://www.camptocamp.com
>
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