<div dir="ltr"><div>Say I have 2 entities with a one to many relationship: class A(db.Entity): bs = set('B') class B(db.Entity): a = Required('A') status = Required(unicode) I then want to query for all "A", that have Bs that all have the status "whatever". How I assumed it could be done: select(a for a in A if a.bs.status == 'whatever') or select(a for a in A if all(b.status == 'whatever' for b in <a href="http://a.bs">a.bs</a>)) But neither work. What is the "pony way" of doing this? A python example of what I mean (I obviously would like to do it properly all in pony though): for a in models.A.select(): if all(b.status == 'whatever' for b in <a href="http://a.bs">a.bs</a>): yield a </div>Thanks in advance for any guidance. <div> -- Regards, Matthew Bell </div></div>