This one time, at band camp, Michael Bayer wrote:
>heres something in rev 1718 you can try:
>
>from sqlalchemy import synonym
>
>mapper(PropertyClass, table,
> properties = {
> '_hash': table.c.hash,
> 'hash':synonym('_hash')
> },
> )
>
>results = session.query(PropertyClass).select_by(hash="a b")
>
>im a little antsy on this feature since its a whole new
>MapperProperty which is literally used only by the select_by and
>get_by functions...but it seems to be the clearest way to do it.
>maybe synonym() will have other uses i havent realized yet.
You don't like select_by at all, do you :)
I'm also suspicious of it, but only because it now presents the same
attribute twice, which means you're exposing data; my original use case was
to hide the attribute behind accessor methods so that one couldn't set it;
with this now one can still subvert my access control and set the attribute
from the mapped object.
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