QueryDsl 中是否有计数（如果）查询的方法？

Question

I want to result like that query.

SELECT 
  book_id, 
  COUNT(member_id), 
  COUNT(if(returned = 1, 1, null)) 
...

There is case-when query in QueryDSL, But it is not what I want exactly.
I can't find any ways to use COUNT IF query.
So I wonder is there any ways about using COUNT() query that used COUNT IF function in querydsl.

https://www.mysqltutorial.org/mysql-count/

JPQLQuery<?> countDto = getQueryDsl().createQuery()
  .select(bookRental.bookId, bookRental.memberId.count(), bookRental.memberId.count(...)
  .from(bookRental)
  .where(bookId.in(bookIds))
  .groupBy(bookRental.bookId);

Or Should I use CaseBuilder()?

new CaseBuilder()
    .when(bookRental.returned.eq(true))
    .then(bookRental.memberId.count(1))
    .otherwise(0)

Answer 1

bookRental.memberId.eq('test').count().as("bookRentalCount")