java - Micronaut 嵌套 Json 输入验证

Question

你如何验证 Json Body

{
  "name": "good student",
  "marks": {
    "math": "122",
    "english": "12"
  }
}

这不起作用，它接受 JSON 正文中有或没有标记，即使 @NotNull 等被添加到 Student DTO 中的标记

@Introspected
public @Data class Student {
    @NotBlank
    private String name;
    
    @Valid
    @JsonProperty("marks")
    private Marks marks;
    
    @Introspected
    static @Data class Marks{
        @NotBlank
        private String math;
        @NotBlank
        private String english;
    }
}

用@Validated 注释的 Controller
用@Valid @Body 注释的方法参数

Answer 1

这在 Micronaut 2.0.3 版中对我有用:

@Introspected
public @Data class Student {
    @NotBlank
    private String name;

    @Valid
    @NotNull
    private Marks marks;

    @Introspected
    static @Data class Marks{
        @NotBlank
        private String math;

        @NotBlank
        private String english;
    }
}

字段 marks应注解:

@NotNull - 告诉 validator 它必须存在

@Valid - 告诉 validator 它必须验证嵌套字段

示例 Controller 如下所示:

@Validated
@Controller("/students")
public class StudentController {
    @Post
    public void create(@Valid @Body Student student) {
        // do something
    }
}

通过 curl 测试:

curl -v -X POST http://localhost:8080/students -H 'Content-Type: application/json' -d '{"name":"John"}' | jq

有了这个回应:

{
  "message": "student.marks: must not be null",
  "_links": {
    "self": {
      "href": "/students",
      "templated": false
    }
  }
}