Question

我在ExposedBD（kotlin）中进行了多对多引用，如下所示： https://github.com/JetBrains/Exposed/wiki/DAO#many-to-many-reference

但是，当我尝试在我的API（Javalin）中返回对象列表时，存在无限递归（Jackson）的问题。因此，我想知道如何添加注释“ @jsonIgnore”，或者在这种情况下是否还有其他替代解决方案。这是映射：

非常感谢

// many-to-many Actor--StarWarsFilms

// Actor Entity
object Actors: IntIdTable() {
    val firstname = varchar("firstname", 50)
    val lastname = varchar("lastname", 50)
}

class Actor(id: EntityID<Int>): IntEntity(id) {
    companion object : IntEntityClass<Actor>(Actors)

    var firstname by Actors.firstname
    var lastname by Actors.lastname
}

// StarWarFilm Entity
object StarWarsFilms : IntIdTable() {
  val sequelId = integer("sequel_id").uniqueIndex()
  val name = varchar("name", 50)
  val director = varchar("director", 50)
}

class StarWarsFilm(id: EntityID<Int>) : IntEntity(id) {
 companion object : IntEntityClass<StarWarsFilm>(StarWarsFilms)

 var sequelId by StarWarsFilms.sequelId 
 var name     by StarWarsFilms.name
 var director by StarWarsFilms.director
 var actors by Actor via StarWarsFilmActors
}

// Intermediate table
object StarWarsFilmActors : Table() {
    val starWarsFilm = reference("starWarsFilm", StarWarsFilms).primaryKey(0)
    val actor = reference("actor", Actors).primaryKey(1)
}

Kotlin暴露了多对多Jackson无限递归（StackOverflowError）

0 个答案: