@query_many_property
def initial_activations(self):
    'Return initial activation as a SQLAlchemy query'
    return self.activations.filter(is_none(Activation.m.caller_id))
Return initial activation as a SQLAlchemy query
@query_many_property
def initial_activations(self):
    
    return self.activations.filter(is_none(Activation.m.caller_id))