spring-data-jpa querydsl subquery

[rosecorp]

Hello Guys,

I have problem with querydsl using spring-data-jpa 1.2.0.RELEASE

I have Entity Item which has set of Promotions and each promotion has PromotionType which is an Enum. I am trying to find all items which contains set of filtered promotions where PromotionType == PromotionType.Special. I think I'll achieve that with a subquery to set of promotions like this:

Predicate:

public class ItemPredicates {
private static QItem $ = QItem.item;

public static BooleanExpression getSpecialItems() {
return $.promotions.any().promotionType.eq(PromotionType. SPECIAL);
}

}

Test:

//prepare data
Item item = new Item();
item.setPromotions(Sets.newHashSet(promotion(Promo tionType.SPECIAL), promotion(PromotionType.NORMAL)));

//assertion
Item specialItems = itemRepository.findOne(ItemPredicates.getSpecialIt ems());


So I'd expected item with filtered out promotions with only special type of promotion, instead I always get an item which have set of promotions. If I'll change test to this:


Test:

//prepare data
Item item = new Item();
item.setPromotions(Sets.newHashSet(promotion(Promo tionType.NORMAL)));

//assertion
Item specialItems = itemRepository.findOne(ItemPredicates.getSpecialIt ems());


Then I'll get no item which is correct. I presume I need to do a subquery to set of promotions but I spend few days on investigations and still don't know how to do it with querydsl.

Please could you give me a hand with it?