Question

我正在创建一个API rest，当我执行“ find ALL”而不是获取所有数据时，我只需要获取其中的一部分。使用Java，我是这样做的：

 @GetMapping(value = "/pagina")
    public ResponseEntity<Page<PersonFindDTO>> findAll(
            @RequestParam(value = "page", defaultValue = "0") Integer page,
            @RequestParam(value = "linesPerPage", defaultValue = "24") Integer linesPerPage,
            @RequestParam(value = "order", defaultValue = "ASC") String order,
            @RequestParam(value = "orderBy", defaultValue = "name") String orderBy) {


        var person = personService.findAll(page, linesPerPage, order, orderBy);

        var personFindDto = person.map(PersonFindDTO::new);

        return ResponseEntity.ok().body(personFindDTO);
    }

与Kotlin一起，我正在尝试这种方式：

   @GetMapping(value = ["/{companyId}/{active}"])
    override fun findAll(
            @RequestParam(value = "page", defaultValue = "0") page: Int,
            @RequestParam(value = "linesPerPage", defaultValue = "24") linesPerPage: Int,
            @RequestParam(value = "order", defaultValue = "ASC") order: String,
            @RequestParam(value = "orderBy", defaultValue = "tradeName") orderBy: String,
            @PathVariable companyId: Long, @PathVariable active: Boolean): ResponseEntity<Page<Any>> {

        val lp = service.findAll(page, linesPerPage, order, orderBy, companyId, active)?.let {
            it.map {
                fun LegalPerson.toLegalPersonMPage() = LegalPersonMPage(id = it.id,
                        tradeName = it.tradeName, companyName = it.companyName, cnpj = it.cnpj)
            }
        }
        return ResponseEntity.ok().body(lp)
    }

但是返回总是空的。有人可以帮忙吗？拜托。

更新：

我的LegalPerson班

data class LegalPerson(
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  override var id: Long,
  @Column(nullable = false)
  val companyId: Long,
  @Column(nullable = false)
  var active: Boolean,
  @Column(nullable = false, length = 100)
  val tradeName: String,
  @Column(nullable = false, length = 100)
  val companyName: String,
  @Column(nullable = false, length = 100)
  val email: String,
  @Column(nullable = false, length = 18)
  val cnpj: String,
  @Column(length = 15)
  val stateRegistration: String,
  @Column(length = 15)
  val municipalRegistration: String,
  @Column(nullable = false)
  val openingDate: LocalDate,
  @Column(nullable = false)
  val address: Long,
  @ElementCollection(fetch = FetchType.EAGER)
  @CollectionTable(name = "phone", schema = "legal_person")
  val phones: List<Long>
)

我的LegalPersonMPage类

data class LegalPersonMPage(

        val id: Long,
        val tradeName: String,
        val companyName: String,
        val cnpj: String
)  {
}

Answer 1

函数LegalPerson.toLegalPersonMPage()已定义但从未调用。为了使这一点更加清楚，请在map {...}外部定义函数，然后在map {...}内部对其进行调用。

fun LegalPerson.toLegalPersonMPage() = LegalPersonMPage(id = this.id,
    tradeName = this.tradeName, companyName = this.companyName, cnpj = this.cnpj)


@GetMapping(value = ["/{companyId}/{active}"])
override fun findAll(
    @RequestParam(value = "page", defaultValue = "0") page: Int,
    @RequestParam(value = "linesPerPage", defaultValue = "24") linesPerPage: Int,
    @RequestParam(value = "order", defaultValue = "ASC") order: String,
    @RequestParam(value = "orderBy", defaultValue = "tradeName") orderBy: String,
    @PathVariable companyId: Long, @PathVariable active: Boolean): ResponseEntity<Page<Any>> {

    val lp = service.findAll(page, linesPerPage, order, orderBy, companyId, active)?.let {
        it.map { legalPerson -> legalPerson.toLegalPersonMPage() }
    }
    return ResponseEntity.ok().body(lp)
}

Kotlin，将一个班级映射到另一个班级

1 个答案: