Thanks for the quick fixe.
Couldn't this read only class property also be set on any mapped
attribute so that I can remove the boilerplate Synonym and just use
the original mapped attribute as a read only one? A mapper level
readonly option (like column_prefix) would be very useful too.
On 27 juin, 22:47, Michael Bayer <[EMAIL PROTECTED]> wrote:
> On Jun 27, 2007, at 3:48 PM, jdu wrote:
>
>
>
>
>
> > It seems that both options don't work in common:
>
> > dates = Table('dates', meta,
> > Column('date', Date, primary_key=True)
> > )
> > mapper(MyDate, dates, column_prefix='_', properties=dict(
> > date = synonym('_date'),
> > )
>
> > produces with 0.3.8:
>
> > ArgumentError: WARNING: column 'date' not being added due to property
> > '<sqlalchemy.orm.interfaces.SynonymProperty object at 0x8ec91ac>'.
> > Specify 'allow_column_override=True' to mapper() to ignore this
> > condition.
>
> this is a bug, fixed in r2795.
>
>
>
> > I don't want override. My underlying goal is to make MyDate readOnly.
> > As mapped attributes are already properties, it would be great to be
> > able to
> > 'declare' the readonly behaviour in the mapper.
>
> id say this is out of scope for mapper. id favor adding a "property"
> argument to SynonymProperty that specifies a property class (i.e.
> __get__(), __set__(), __delete__()) to be assembled on the class
> (currently the proxy=True argument will assemble a default accessor
> to the column-mapped attribute).
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