Question

我有一个Spring Data REST应用程序，它返回这个JSON：

{
  "_embedded" : {
    "persons" : [ {
      "personDetail" : {
        "name" : "Alex",
        "surname" : "Red",
        "id" : {
          "group" : "A",
          "subclass" : "1"
        },
        "_links" : {
          "self" : {
            "href" : "https ://localhost:8080/myApp/api/personDetails/A_1"
          }
        }
      }
     }]
    }
}

当我去网址时：

https：// localhost：8080 / myApp / api / personDetails / A_1

或者这个网址：

https：// localhost：8080 / myApp / api / persons / 04ee99a5-1578-400a-84be-d1ca87cda752 / personDetail

该应用程序返回此JSON：

{
  "name" : "Alex",
  "surname" : "Red",
  "_links" : {
    "self" : {
      "href" : "https ://localhost:8080/myApp/api/personDetails/A_1"
    },
    "personDetail" : {
      "href" : "https ://localhost:8080/myApp/api/personDetails/A_1"
    }
  }
}

＆＃34; id＆＃34;场似乎消失了。哪里完成了？如何进行正确的物体投影？

这是人类：

@Entity
@Table
public class Person {
    @Id
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid2")
    @Column(columnDefinition = "BINARY(16)", length = 16)
    private UUID id;

    @ManyToOne(fetch = FetchType.EAGER)
    private PersonDetail personDetail;

    public UUID getId() {
        return id;
    }

    public void setId(UUID id) {
        this.id = id;
    }

    public PersonDetail getPersonDetail() {
        return personDetail;
    }

    public void setPersonDetail(PersonDetail personDetail) {
        this.personDetail = personDetail;
    }
}

这是PersonDetail类：

@Entity
@Table
public class PersonDetail {
    @EmbeddedId
    private PersonDetailId id;

    @Column
    private String name;

    @Column
    private String surname;

    public PersonDetailId getId() {
        return id;
    }

    public void setId(PersonDetailId id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public String getSurname() {
        return surname;
    }

    public void setSurname(String surname) {
        this.surname = surname;
    }

    protected String[] getExcludeFieldNames() {
        return null;
    }

    @Override
    public String toString() {
        return ReflectionToStringBuilder.toStringExclude(this, getExcludeFieldNames());
    }
}

这是PersonDetailId类：

public class PersonDetailId implements Serializable {

    @Column(name = "group", nullable = false)
    private String group;

    @Column(name = "subclass", nullable = false)
    private String subclass;

    public PersonDetailId() {
        super();
    }

    public PersonDetailId(String group, String subclass) {
        super();
        this.group = group;
        this.subclass = subclass;
    }

    public String getGroup() {
        return group;
    }

    public void setGroup(String group) {
        this.group = group;
    }

    public String getSubclass() {
        return subclass;
    }

    public void setSubclass(String subclass) {
        this.subclass = subclass;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append(group).append("_").append(subclass);
        return builder.toString();
    }

}

这是存储库REST：

@RepositoryRestResource
public interface PersonDetailRepository extends JpaRepository<PersonDetail, PersonDetailId> {

    @RestResource(exported=false)
    PersonDetail findBySurname(String surname);

}

这是我使用的转换器：

@Component
public class PersonDetailIdConverter implements Converter<String, PersonDetailId> {

    @Autowired
    private PersonDetailRepository personDetailRepository;

    @Override
    public PersonDetailId convert(String source) {

        PersonDetailId result = null;

        List<PersonDetail> details = personDetailRepository.findAll();
        for (PersonDetail detail:details) {
            if (detail.getId().toString().equals(source)) {
                result = detail.getId();
                break;
            }
        }

        return result;
    }

}

这是注册转换器的配置：

@Configuration
public class CustomizedRestMvcConfiguration extends RepositoryRestConfigurerAdapter {

    @Bean
    PersonDetailIdConverter personDetailIdConverter(){
        return new PersonDetailIdConverter();
    }

    @Override
    public void configureConversionService(ConfigurableConversionService conversionService) {
        conversionService.addConverter(personDetailIdConverter());
        super.configureConversionService(conversionService);
    }

}

我使用转换器是因为它是使URL工作的唯一方法：

＆＃34; HREF＆＃34; ：＆＃34; https：// localhost：8080 / myApp / api / personDetails / A_1＆＃34;

有什么想法吗？感谢。

修改

它似乎取决于预测。当我使用我创建的投影转到对象的链接时，返回的JSON包含我需要的所有值。

Answer 1

由于this issue $sql = "insert into hotel (hotel_name, hotel_website, hotel_description, hotel_email, hotel_contact) values ('$hotel_name','$hotel_website','$hotel_desc','$hotel_email','$hotel_contact')"; mysqli_query($conn, $sql); ?> <script type="text/javascript"> alert("Hotel Information have been Saved"); </script> <?php $result = mysqli_query($conn,"select hotel_id from hotel"); $row = mysqli_fetch_assoc($result); $hotel_id = $row["hotel_id"]; echo '<script>window.location.href="property_add_address.php?id=".$hotel_id."</script>';上有ResourceSupport.getId()注释，因此Spring Data REST不会导出实体的ID。但是你可以重命名它们，例如到@JsonIgnore（或者只是重命名你的getter方法）。

还要记得expose your IDs，正如Alessandro C所提到的那样。

Answer 2

从Spring 3.1开始，这是注册转换器的方法：

@Import(RepositoryRestMvcConfiguration.class)
public class CustomizedRestMvcConfiguration implements RepositoryRestConfigurer {

    @Override
    public void configureConversionService(ConfigurableConversionService conversionService) {
        conversionService.addConverter(new PersonDetailIdConverter());
        super.configureConversionService(conversionService);
    }

}

如何使用@EmbeddedId使用Spring Data REST和ConversionService？

2 个答案: