[sqlalchemy] sqlalchemy.exc.InvalidRequestError: Mapper properties (i.e. deferred,column_property(), relationship(), etc.) must be declared as @declared_attr callables on declarative mixin classes.

Hi, I currently have the following mix-in class construction (based on the documentation http://docs.sqlalchemy.org/en/latest/orm/extensions/declarative/mixins.html ) Base = declarative_base() class BaseCountry(object): """ Managed through Kotti """ @declared_attr def

Re: [sqlalchemy] sqlalchemy.exc.InvalidRequestError: Mapper properties (i.e. deferred,column_property(), relationship(), etc.) must be declared as @declared_attr callables on declarative mixin classes

Hi Andreas, On Fri, Jan 15, 2016 at 02:56:39AM -0800, Andreas Jung wrote: > Hi, > > I currently have the following mix-in class construction (based on the > documentation > http://docs.sqlalchemy.org/en/latest/orm/extensions/declarative/mixins.html > ) > > Base = declarative_base() > >

Re: [sqlalchemy] sqlalchemy.exc.InvalidRequestError: Mapper properties (i.e. deferred,column_property(), relationship(), etc.) must be declared as @declared_attr callables on declarative mixin classes

On Fri, Jan 15, 2016 at 02:26:37PM +0100, Michal Petrucha wrote: > Hi Andreas, > > On Fri, Jan 15, 2016 at 02:56:39AM -0800, Andreas Jung wrote: > > Hi, > > > > I currently have the following mix-in class construction (based on the > > documentation > >