Spring boot @ResponseBody doesn't serialize entity id

Question

Have a strange problem and can't figure out how to deal with it. Have simple POJO:

@Entity @Table(name = "persons") public class Person {      @Id     @GeneratedValue     private Long id;      @Column(name = "first_name")     private String firstName;      @Column(name = "middle_name")     private String middleName;      @Column(name = "last_name")     private String lastName;      @Column(name = "comment")     private String comment;      @Column(name = "created")     private Date created;      @Column(name = "updated")     private Date updated;      @PrePersist     protected void onCreate() {         created = new Date();     }      @PreUpdate     protected void onUpdate() {         updated = new Date();     }      @Valid     @OrderBy("id")     @OneToMany(mappedBy = "person", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)     private List<PhoneNumber> phoneNumbers = new ArrayList<>();      public Long getId() {         return id;     }      public void setId(Long id) {         this.id = id;     }      public String getFirstName() {         return firstName;     }      public void setFirstName(String firstName) {         this.firstName = firstName;     }      public String getMiddleName() {         return middleName;     }      public void setMiddleName(String middleName) {         this.middleName = middleName;     }      public String getLastName() {         return lastName;     }      public void setLastName(String lastName) {         this.lastName = lastName;     }      public String getComment() {         return comment;     }      public void setComment(String comment) {         this.comment = comment;     }      public Date getCreated() {         return created;     }      public Date getUpdated() {         return updated;     }      public List<PhoneNumber> getPhoneNumbers() {         return phoneNumbers;     }      public void addPhoneNumber(PhoneNumber number) {         number.setPerson(this);         phoneNumbers.add(number);     }      @Override     public String toString() {         return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);     } }  @Entity @Table(name = "phone_numbers") public class PhoneNumber {      public PhoneNumber() {}      public PhoneNumber(String phoneNumber) {         this.phoneNumber = phoneNumber;     }      @Id     @GeneratedValue     private Long id;      @Column(name = "phone_number")     private String phoneNumber;      @ManyToOne     @JoinColumn(name = "person_id")     private Person person;      public Long getId() {         return id;     }      public void setId(Long id) {         this.id = id;     }      public String getPhoneNumber() {         return phoneNumber;     }      public void setPhoneNumber(String phoneNumber) {         this.phoneNumber = phoneNumber;     }      public Person getPerson() {         return person;     }      public void setPerson(Person person) {         this.person = person;     }      @Override     public String toString() {         return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);     } } 

and rest endpoint:

@ResponseBody @RequestMapping(method = RequestMethod.GET) public List<Person> listPersons() {     return personService.findAll(); } 

In json response there are all fields except Id, which I need on front end side to edit/delete person. How can I configure spring boot to serialize Id as well?

That's how response looks like now:

[{   "firstName": "Just",   "middleName": "Test",   "lastName": "Name",   "comment": "Just a comment",   "created": 1405774380410,   "updated": null,   "phoneNumbers": [{     "phoneNumber": "74575754757"   }, {     "phoneNumber": "575757547"   }, {     "phoneNumber": "57547547547"   }] }] 

UPD Have bidirectional hibernate mapping, maybe it's somehow related to issue.

Answer 1

I recently had the same problem and it's because that's how spring-boot-starter-data-rest works by default. See my SO question -> While using Spring Data Rest after migrating an app to Spring Boot, I have observed that entity properties with @Id are no longer marshalled to JSON

To customize how it behaves, you can extend RepositoryRestConfigurerAdapter to expose IDs for specific classes.

import org.springframework.context.annotation.Configuration; import org.springframework.data.rest.core.config.RepositoryRestConfiguration; import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurerAdapter;  @Configuration public class RepositoryConfig extends RepositoryRestConfigurerAdapter {     @Override     public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {         config.exposeIdsFor(Person.class);     } }