shyriak wrote:
>
> Hi,
> I have the following code:
>
> # tables
> datlli_table = Table('DATLLI', meta, autoload = True )
> hstlli_table = Table('HSTLLI', meta, autoload = True )
>
> # classes
> class Llicencia(object): pass
>
> # mapers
> datlli_mapper = mapper(Llicencia, datlli_table,
> primary_key=[datlli_table.c.dni], entity_name='vigent')
> hstlli_mapper = mapper(Llicencia, hstlli_table,
> primary_key=[hstlli_table.c.dni], entity_name='historic')
>
> I'm trying to do a session.refresh(llicencia) and I get an error
> because the entity_name is None, but the refresh() function not accept
> the entity_name as an argument.
yes that is a bug, for which I've added ticket #914. Its quick to fix
although I am not at a terminal right now, so as a temporary workaround,
just call the "corrected" version of the function:
from sqlalchemy.orm import object_session, object_mapper
def refresh(instance):
object_session(instance).\
query(object_mapper(instance)).\
_get(instance._instance_key, reload=True)
release 0.4.2 hasn't gone out yet so this fix will be there.
>
> session.refresh(llicencia)
> File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/session.py",
> line 362, in refresh
> if self.query(obj.__class__)._get(obj._instance_key, reload=True)
> is None:
> File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/session.py",
> line 295, in query
> q = query.Query(_class_mapper(mapper_or_class,
> entity_name=entity_name), self, **kwargs)
> File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/mapper.py",
> line 1875, in class_mapper
> raise exceptions.InvalidRequestError("Class '%s' entity name '%s'
> has no mapper associated with it" % (class_.__name__, entity_name))
> sqlalchemy.exceptions.InvalidRequestError: Class 'Llicencia' entity
> name 'None' has no mapper associated with it
>
>
> There is some other alternative way to do it?
> Thanks.
>
>
> >
>
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