Save entity which has one-to-one mapping in spring data rest - spring-data-rest

Question

I have a very simple spring boot + spring data rest app. I tried to save the entity which has a one-to-one mapping using spring data rest but looks like only the parent is saved, the child is not.
Below is my code
#SpringBootApplication
public class Application{
#Autowired
private PersonRepository personRepo;
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Bean
CommandLineRunner init(){
Address address = new Address();
address.setCountry("US");
address.setState("SV");
Person person = new Person();
person.setName("Vincent");
person.setAddress(address);
personRepo.save(person);
return null;
}
}
#Entity
public class Address implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue
private int id;
private String country;
private String state;
}
#Entity
public class Person implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue
private int id;
private String name;
#OneToOne(cascade={CascadeType.ALL})
private Address address;
}
#Projection(name="inlineAddress",types={Person.class})
public interface InlineAddress {
String getName();
Address getAddress();
}
#RepositoryRestResource(excerptProjection=InlineAddress.class)
public interface PersonRepository extends JpaRepository<Person, Integer> {
Person findByName(#Param("name") String name);
Person findById(#Param("id") int id);
Page<Person> findByNameStartsWith(#Param("name") String name, Pageable page);
}
public interface AddressRepository extends JpaRepository<Address, Integer> {
}
After startup, if I visit http://localhost:8080/api/
I saw below response
{
_links: {
addresses: {
href: "http://localhost:8080/api/addresses{?page,size,sort}",
templated: true
},
persons: {
href: "http://localhost:8080/api/persons{?page,size,sort,projection}",
templated: true
},
profile: {
href: "http://localhost:8080/api/profile"
}
}
}
Then I visit http://localhost:8080/api/persons, so far every thing is good
{
"_embedded": {
"persons": [
{
"address": {
"country": "US",
"state": "SV"
},
"name": "Vincent",
"_links": {
"self": {
"href": "http://localhost:8080/api/persons/1"
},
"person": {
"href": "http://localhost:8080/api/persons/1{?projection}",
"templated": true
},
"address": {
"href": "http://localhost:8080/api/persons/1/address"
}
}
}
]
},
"_links": {
"self": {
"href": "http://localhost:8080/api/persons"
},
"profile": {
"href": "http://localhost:8080/api/profile/persons"
},
"search": {
"href": "http://localhost:8080/api/persons/search"
}
},
"page": {
"size": 20,
"totalElements": 1,
"totalPages": 1,
"number": 0
}
}
However, after I did a post http://localhost:8080/api/persons/ with
{
"name": "Michael",
"address": {
"country": "US",
"state": "SV"
}
}
It shows below, looks like the address is not get inserted for Michael
{
"_embedded": {
"persons": [
{
"address": {
"country": "US",
"state": "SV"
},
"name": "Vincent",
"_links": {
"self": {
"href": "http://localhost:8080/api/persons/1"
},
"person": {
"href": "http://localhost:8080/api/persons/1{?projection}",
"templated": true
},
"address": {
"href": "http://localhost:8080/api/persons/1/address"
}
}
},
{
"address": null,
"name": "Michael",
"_links": {
"self": {
"href": "http://localhost:8080/api/persons/2"
},
"person": {
"href": "http://localhost:8080/api/persons/2{?projection}",
"templated": true
},
"address": {
"href": "http://localhost:8080/api/persons/2/address"
}
}
}
]
},
"_links": {
"self": {
"href": "http://localhost:8080/api/persons"
},
"profile": {
"href": "http://localhost:8080/api/profile/persons"
},
"search": {
"href": "http://localhost:8080/api/persons/search"
}
},
"page": {
"size": 20,
"totalElements": 2,
"totalPages": 1,
"number": 0
}
}
Is there anything wrong with my code? I have tried using old approach without using spring data rest but using rest controller, the same json I posted was working fine. Not sure why spring data rest does not work here.

Answer 1

OK. Seems no way to do this. I have to first post a person by
{"name"="Michael"}
and then post an address by
{"country":"US,"state":"SV:} ,
and last put address to this person
{ "name":"Michael", "address":"localhost:8080/addresses/1" }