CoreData NSPredicate具有多个NSSet

Question

目前我尝试将以下SQL查询转换为NSPredicate：

SELECT name FROM person WHERE tournament='x' AND rankingID = (SELECT id FROM ranking WHERE place=1 AND round='final');

排名是一个人的NSSet。 我曾经这样试过：

NSPredicate(format: "tournament = %@ AND ANY rankings.place = 1 AND ANY rankings.round = 'final'", selectedTournament!)

但那不能做我想做的事。 ：（

Answer 1

好的，我想我做到了，这是我的解决方案：

NSPredicate(format: "tournament = %@ AND SUBQUERY(rankings, $ranking, $ranking.place = 1 AND $ranking.round = 'final').@count > 0", selectedTournament!)