Question

我试图执行以下查询：

returnValue = (Long) super.createQuery("Select Count(*) From User u Left Outer Join u.rolesRelated r "
                    + "Where r.role.id = :roleId And u.id = :userId")
                    .setParameter("userId", userId)
                    .setParameter("roleId", roleId)
                    .getSingleResult();

但是我收到了这个错误：

 org.hibernate.QueryException: could not resolve property: role.id of: com.sp.common.core.model.User

此属性不存在，因为role.id位于user.rolesRelated中，而不是用户中。这是我的hibernate映射：

<class name="com.sp.common.core.model.User" table="user">
/* more meaningless properties */
        <set cascade="all" name="rolesRelated" sort="unsorted" table="sec_rperfil_usuario"
            lazy="false" fetch="join">
            <key column="id_usuario" />
            <composite-element class="com.sp.common.core.model.UserRole">
                <many-to-one name="role" class="com.sp.common.core.model.Role"
                    column="id_perfil" cascade="none" lazy="false" fetch="join" />
            </composite-element>
        </set>
</class>

有谁知道这里有什么问题？

提前致谢

Answer 1

尝试在Role上进行另一次显式连接。

SELECT COUNT(*) FROM User u LEFT OUTER JOIN u.rolesRelated rr 
LEFT OUTER JOIN rr.role r WHERE r.id = :roleId And u.id = :userId

HQL查询从错误的类获取属性

1 个答案: