CriteriaQuery返回错误结果

Question

我的CriteriaQuery只返回一个记录，应该是dateFrom = '2019-12-10'和dateTo = '2019-12-20'的两个，我不知道为什么。

这是我的数据库截图。

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这是我的疑问：

        CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
        CriteriaQuery<Reservation> reservationQuery  = criteriaBuilder.createQuery(Reservation.class);
        Root<Reservation> reservationRoot = reservationQuery.from(Reservation.class);

        Predicate dateFrom = criteriaBuilder.greaterThanOrEqualTo(reservationRoot.get("dateFrom"), reservationDto.getDateFrom());
        Predicate dateTo = criteriaBuilder.lessThanOrEqualTo(reservationRoot.get("dateTo"), reservationDto.getDateTo());

        reservationQuery.where(dateFrom, dateTo);
        TypedQuery<Reservation> res = entityManager.createQuery(reservationQuery);
        List<Reservation> result = res.getResultList();

Answer 1

我用查询解决了我的问题，它运行得很好。

        CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
        CriteriaQuery<Reservation> reservationQuery  = criteriaBuilder.createQuery(Reservation.class);
        Root<Reservation> reservationRoot = reservationQuery.from(Reservation.class);

        Predicate dateFrom = criteriaBuilder.greaterThanOrEqualTo(reservationRoot.get("dateFrom"), reservationDto.getDateFrom());
        Predicate dateTo = criteriaBuilder.lessThanOrEqualTo(reservationRoot.get("dateTo"), reservationDto.getDateTo());

        criteriaBuilder.and(dateFrom);
        criteriaBuilder.and(dateTo);
//        reservationQuery.where(dateFrom, dateTo);
        TypedQuery<Reservation> res = entityManager.createQuery(reservationQuery);
        List<Reservation> result = res.getResultList();
        return result;