On May 3, 2009, at 5:14 AM, Werner F. Bruhin wrote:
>
> Michael Bayer wrote:
>> You need to set allow_null_pks=true on your mapper. This will be on
>> by default in 06.
>>
> I am running into the same problem, but I use declarative.
>
> After some search and looking at mapper.py I figured out I could do
> this:
>
> db.Vcbook.__mapper__.allow_null_pks = True
>
> But I did not like using __mapper__, so nearly just asked but then
> gave
> the search option another go on the doc and found:
>
> __mapper_args__ = {'allow_null_pks': True}
>
> Now, if I would want to do this not in my model.py but just in the
> code
> section where I need this would using the "__mapper__" be the only way
> to do this or is there a cleaner way, e.g.
>
> db.Vcbook.Getmapper().allow_null_pks = True or similar?
you can make a mapper() decorator and pass it to your declarative base
def mapper(*arg, **kw):
kw['allow_null_pks'] = True
return orm.mapper(*arg, **kw)
Base = declarative_base(mapper=mapper)
>
>
> Werner
>
>
> >
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