auto_props_for_gm2m.py

def auto_props(cls):
    gm2m_fields = map( lambda x: x[0],
        filter(lambda x: isinstance(x[1], GM2MField), cls._meta._forward_fields_map.items()))

    for field in gm2m_fields:
        for model in getattr(cls, field).get_related_models(include_auto=True):
            model_lower = model.lower()

            if not hasattr(cls, model_lower):
                setattr(cls, model_lower, property(lambda self:
                                                   map(lambda x: x.gm2m_tgt,
                                                       self.settings.filter(Model='.'.join([cls._meta.app_label, model])))))
    return cls