javax.persistence.NoResultException: No entity found for query

Question

Before I posted this question, I already looked this, but I couldn\'t get what I was looking for.

I know that for the query I wrote there may exist only one row or n

Answer 1

When you don't know whether there are any results, use getResultList().

List foundUsers = (List) query.getResultList();
        if (foundUsers == null || foundUsers.isEmpty()) {
            return false;
        }
User foundUser = foundUsers.get(0);