On Oct 13, 2008, at 11:14 AM, g00fy wrote:
>
> I have my table Warehouse collumns like:
> id, owner_id .... , area_total, area_office ... ,area_storage
> I would like to have acces to all areas by Warehouse.area.property:
> example:
> Warehouse.area.storage
>
> I did composite(), but now I can't filter like:
> filter(Warehouse.area.total >=100) and even not by
> fitler(Warehouse.area_total >=100)
>
> but i can access
> Warehouse.area.total
>
> I don't want to create aditional Area table, becouse that will create
> expensive joins.
>
> Is there any way to connect a group of fields to another "virtual"
> relation?
the functionality you describe is not built in to SQLA but you can
roll it yourself by building your own proxy object, along the lines of:
class Warehouse(object):
...
class Proxy(object):
def __getattr__(self, key):
return getattr(Warehouse, key)
Warehouse.area = Proxy()
i wouldnt recommend composites since thats not a very well defined
feature with SQLA, though that usage is interesting, perhaps somehting
that can be implemented eventually.
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