I want to upgrade queryDsl from verision 3 to version 4. But i've an issue with exist() In QueryDsl 3 exist return a Boolean but in QUeryDSL 4 it return a BooleanOperation. In my case i really want the boolean but i don't know how to retrieve it.
The best solution i've found is to do
.fetchCount() >0
But I want to know if another (better) solution exist.
Another option would be something like:
queryFactory.select(queryField).from(qTable)
.where(queryField.eq(value))
.groupBy(queryField)
.having(qTable.uuid.count().gt(0))
.fetchOne() != null;
This passes the greater than responsibility over to the query. However it is possibly less readible so will depend on the requirements which is better.