长类型不正确

Question

我在 Hibernate 中有以下查询：

val em: EntityManager = ...
em.createQuery("SELECT id FROM Segment s WHERE $condition", Long::class.java)
val result = q.resultList

运行它时，我收到以下错误：

Type specified for TypedQuery [long] is incompatible with query return type [class java.lang.Long]

Answer 1

看起来被视为Long::class.java未装箱，应替换为Long::class.javaObjectType

工作代码是：

val em: EntityManager = ...
em.createQuery("SELECT id FROM Segment s WHERE $condition", Long::class.javaObjectType)
val result = q.resultList