Conflict when using declarative configuration and subclassing

[yorjo]

Hi,

Don't know if it's something that I should not do or a bug but I notice a weird behavior when using declarative configuration and subclassing.

The code:

#in __init__.py of a tutorial project

def main(global_config, **settings):

    """ This function returns a Pyramid WSGI application.

    """

    engine = engine_from_config(settings, 'sqlalchemy.')

    DBSession.configure(bind=engine)

    config = Configurator(settings=settings)

    config.add_static_view('static', 'static', cache_max_age=3600)

    config.add_route('view_in_base', '/base')

    config.add_route('fake_view_in_derived1', '/derived1')

    config.add_route('view_in_derived2', '/derived2')

    config.scan()

    return config.make_wsgi_app()

# in views.py

class BaseView(object):

    def __init__(self, request):

        self._request = request

    @view_config(route_name='view_in_base')

    def view_in_base(self):

        pass

    

class DerivedView1(BaseView):    

    def __init__(self, request):

        super(DerivedView, self).__init__(request)

#    @view_config(route_name='fake_view_in_derived1')

#    def fake_view_in_derived1(self):

#        pass

class DerivedView2(DerivedView1):    

    def __init__(self, request):

        super(DerivedView2, self).__init__(request)

    @view_config(route_name='view_in_derived2')

    def view_in_derived2(self):

        pass

If I run proutes development.ini on the project I have the following conflict:

pyramid.exceptions.ConfigurationConflictError: Conflicting configuration actions

  For: ('view', None, '', None, <InterfaceClass pyramid.interfaces.IView>, None, None, None, 'view_in_base', 'view_in_base', False, None, None, None, None)

    Line 15 of file /u/joroy/workspace/new_pyramid/new_pyramid/views.py:

        @view_config(route_name='view_in_base')

    Line 15 of file /u/joroy/workspace/new_pyramid/new_pyramid/views.py:

        @view_config(route_name='view_in_base')

If I uncomment the code in class DerivedView1 to have at least one call to view_config in the intermediate class(DerivedView1) I have no conflict. 

Is this the accepted behavior?

Regards,

Jonathan

FYI: I use pyramid-1.3.4