validation - 我们如何在Collection上进行kotlin数据类验证？

Question

我试图在Kotlin中为我的数据模型添加验证，使用@field批注很容易做到简单的字段。但是，我正在努力对收藏进行同样的处理。

我已将问题上传到github here

Java模型没有问题，但kotlin版本没有问题。我在这里添加两个模型。

public class JavaUser {
    @NotEmpty
    @NotNull
    @Pattern(regexp = "[a-z]*", message = "Only lower case first name")
    private String name;

    private List<
            @NotNull
            @NotEmpty
            @Pattern(regexp = "\\d{10}", message = "Only 10 digits")
                    String> phones;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<String> getPhones() {
        return phones;
    }

    public void setPhones(List<String> phones) {
        this.phones = phones;
    }
}

data class KotlinUser(
    @field:NotEmpty
    @field:NotNull
    @field:Pattern(regexp = "[a-z]*", message = "Only lower case first name")
    val name: String,

    // Cannot use @field here, anything else we could use?
    val phones: List<
        @NotNull
        @NotEmpty
        @Pattern(regexp = "\\d{10}", message = "Only 10 digits")
        String>
)

我的测试-Java测试通过，但Kotlin测试失败

    @Test
    fun `java user validation`() {
        val javaUser = JavaUser()
        javaUser.name = "sadfjsjdfhsjdf"
        javaUser.phones = listOf("dfhgd")

        webTestClient.put().uri("/user/java")
            .body(BodyInserters.fromObject(javaUser))
            .exchange()
            .expectStatus().is4xxClientError
    }

    @Test
    fun `kotlin user validation`() {
        val kotlinUser = KotlinUser(name = "sadfjsjdfhsjdf", phones = listOf("dfhgd"))

        webTestClient.put().uri("/user/kotlin")
            .body(BodyInserters.fromObject(kotlinUser))
            .exchange()
            .expectStatus().is4xxClientError
    }

Controller

@RestController
class Controller {
    @PutMapping("/user/java")
    fun putUser(@RequestBody @Valid javaUser: JavaUser): Mono<ResponseEntity<String>> =
        Mono.just(ResponseEntity("shouldn't get this", HttpStatus.OK))

    @PutMapping("/user/kotlin")
    fun putUser(@RequestBody @Valid kotlinUser: KotlinUser): Mono<ResponseEntity<String>> =
        Mono.just(ResponseEntity("shouldn't get this", HttpStatus.OK))
}

任何帮助将不胜感激。谢谢!

Answer 1

当前不支持此功能。 Kotlin编译器当前忽略类型的注释。

详情请参阅:

https://discuss.kotlinlang.org/t/i-have-a-question-about-applying-bean-validation-2-0/5394

Kotlin data class and bean validation with container element constraints

在Kotlin问题追踪器上也有与此相关的问题:

https://youtrack.jetbrains.net/issue/KT-26605

https://youtrack.jetbrains.net/issue/KT-13228

后者具有目标版本1.4。