How to handle a post request with a ManyToOne relatshionship on an entity with an embeddedId? - spring-boot

Question

I have a rest service with a pom.xml define like this :
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
I have also a Store entity :
#Data
#Entity
#FieldDefaults(level = AccessLevel.PRIVATE)
#Table(name = "magasin")
#Inheritance(strategy = InheritanceType.JOINED)
public class Store implements Serializable {
#EmbeddedId
StoreId storeId;
#Column(name = "nom")
String name;
#MapsId("businessUnitId")
#ManyToOne
#JoinColumn(name = "bu_id", referencedColumnName = "id")
BusinessUnit businessUnit;
The Embeddable StoreId :
#Data
#FieldDefaults(level = AccessLevel.PRIVATE)
#Embeddable
public class StoreId implements Serializable {
#Column(name = "id")
Long id;
#Column(name = "bu_id")
Long businessUnitId;
With the following backendIdConverter :
#Component
public class StoreIdConverter implements BackendIdConverter {
#Override
public Serializable fromRequestId(String id, Class<?> entity) {
if(id != null) {
String[] param = id.split("_");
if (entity.getTypeName().equals(Store.class.getTypeName())) {
StoreId storeId = new StoreId();
storeId.setId(Long.valueOf(param[0]));
storeId.setBusinessUnitId(Long.valueOf(param[1]));
return storeId;
}
}
return id;
}
#Override
public String toRequestId(Serializable id, Class<?> entity) {
if(entity.getTypeName().equals(Store.class.getTypeName())){
StoreId storeId = (StoreId)id;
return String.format("%s_%s", storeId.getId(), storeId.getBusinessUnitId());
}
return id.toString();
}
#Override
public boolean supports(Class<?> entity) {
return true;
}
At this point, i can perform request with the following url without any problems :
http://localhost:9001/stores/1_1
And the resource returned :
{
"storeId" : {
"id" : 11,
"businessUnitId" : 1
},
"name" : "TEST",
"_links" : {
"self" : {
"href" : "http://localhost:9001/stores/11_1"
},
"store" : {
"href" : "http://localhost:9001/stores/11_1"
},
"businessUnit" : {
"href" : "http://localhost:9001/stores/11_1/businessUnit"
}
}
}
But when i'am including a ManyToOne relationship to the store entity into another entity like this :
#Data
#FieldDefaults(level = AccessLevel.PRIVATE)
#Entity
#Table(name = "sms")
#SequenceGenerator(name = "SmsSeq", sequenceName = "sms_seq", allocationSize = 1)
#Inheritance(strategy = InheritanceType.JOINED)
public class Sms implements Serializable {
#Id
#GeneratedValue(generator = "SmsSeq", strategy = GenerationType.SEQUENCE)
#Column(name = "id", nullable = false)
Long id;
#Column(name = "message", nullable = false)
String message;
#ManyToOne(targetEntity = Store.class)
#JoinColumns({
#JoinColumn(name = "magasin_id", referencedColumnName = "id", nullable = false),
#JoinColumn(name = "bu_id", referencedColumnName = "bu_id", nullable = false)
})
Store store;
}
A Post request
http://localhost:9001/smses
{
"message": "Bonjour",
"store": "http://10.1.3.38:9001/stores/1_1"
}
throw this kind of exception :
RepositoryRestExceptionHandler : JSON parse error: No converter found capable of converting from type [java.lang.String] to type [com.test.model.StoreId]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: No converter found capable of converting from type [java.lang.String] to type [com.test.model.StoreId] (through reference chain: com.test.model.Sms["store"])
I understand that the BackendIdConverter does not parse the store associated url, is there a way to achieve the same goal on a Request body ?