Another update!
Maybe the bad thing is to override self.__dict__. Now I set values
without overriding all and
seems to work:
class _Struct(dict):
def __init__(self,**kw):
dict.__init__(self, kw)
for k,v in kw.iteritems():
self.__dict__[k] = v
On Feb 22, 1:25 pm, Andrea <andrea.dellapie...@gmail.com> wrote:
> Little update:
> If I remove "self.__dict__ = self" from _Struct definition exception
> is not raised.
>
> This is the original base class:
>
> class _Struct(dict):
> def __init__(self,**kw):
> dict.__init__(self, kw)
> self.__dict__ = self
>
> On Feb 22, 12:20 pm, Andrea <andrea.dellapie...@gmail.com> wrote:
>
>
>
>
>
>
>
> > Hi all,
> > I have some object on a pre-existing model. Now we want to add a
> > persistance layer and so SQLAlchemy/SQLite will be our choice.
> > When I add an object to session a UnmappedInstanceError is raised:
> > Class 'try_sqlalchemy.example2.applib_model.DescriptorBean'
> > is mapped, but this instance lacks instrumentation. This occurs when
> > the instance
> > is created before
> > sqlalchemy.orm.mapper(try_sqlalchemy.example2.applib_model.DescriptorBean)
> > was called.
>
> > This is the example, three code snippets from three python
> > modules:http://pastebin.com/KLFFN3ke
>
> > On debug I see that the DescriptorBean instance is created after the
> > mapping (mapping is created on startup.createSchema method) so I don't
> > understand the error message.
> > The same problems if I use declarative and inherit from Base (class
> > DescriptorBean(Base, _Struct)). No problems if I have a class that
> > inherits directly from object. Maybe is _Struct inheritance that
> > destroys mapper instrumentation? Any suggestion?
>
> > Thanks,
> > Andrea
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To post to this group, send email to sqlalchemy@googlegroups.com.
To unsubscribe from this group, send email to
sqlalchemy+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/sqlalchemy?hl=en.
