Comment publier entités imbriquées avec les Données du Printemps RESTE

Je suis en train de construire un Printemps de Données RESTE de l'application et je vais avoir quelques problèmes lorsque j'essaie de le POSTER. La principale entité a deux autres entités liées, imbriquées.

Il y a un "questionary" objet qui a beaucoup de réponses et chacun de ces réponses ont beaucoup de réponses.

- Je générer un JSON comme ce à partir de l'avant application pour publier le questionary:

{
    "user": "http://localhost:8080/users/1",
    "status": 1,
    "answers": [
        {
            "img": "urlOfImg",
            "question": "http://localhost:8080/question/6",
            "replies": [
                {
                    "literal": "http://localhost:8080/literal/1",
                    "result": "6"
                },
                {
                    "literal": "http://localhost:8080/literal/1",
                    "result": "6"
                }
            ]
        },
        {
            "img": "urlOfImg",
            "question": "http://localhost:8080/question/6",
            "replies": [
                {
                    "literal": "http://localhost:8080/literal/3",
                    "result": "10"
                }
            ]
        }
    ]
}

Mais quand j'essaie de le poster, j'obtiens l'erreur de suivi de la réponse:

{

    "cause" : {
        "cause" : {
          "cause" : null,
          "message" : "Template must not be null or empty!"
        },
        "message" : "Template must not be null or empty! (through reference chain: project.models.Questionary[\"answers\"])"
      },
      "message" : "Could not read JSON: Template must not be null or empty! (through reference chain: project.models.Questionary[\"answers\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Template must not be null or empty! (through reference chain: project.models.Questionary[\"answers\"])"
}

Edit:

J'ai aussi ajouter mon référentiel:

@RepositoryRestResource(collectionResourceRel = "questionaries", path = "questionaries")
public interface InspeccionRepository extends JpaRepository<Inspeccion, Integer> {
    @RestResource(rel="byUser", path="byUser")
    public List<Questionary> findByUser (@Param("user") User user);
}

Mon Entité Questionary classe est :

@Entity @Table(name="QUESTIONARY", schema="enco" )
public class Questionary implements Serializable {
private static final long serialVersionUID = 1L;
//----------------------------------------------------------------------
//ENTITY PRIMARY KEY ( BASED ON A SINGLE FIELD )
//----------------------------------------------------------------------
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEC_QUESTIONARY")
@SequenceGenerator(name = "SEC_QUESTIONARY", sequenceName = "ENCO.SEC_QUESTIONARY", allocationSize = 1)
@Column(name="IDQUES", nullable=false)
private Integer idques        ;
//----------------------------------------------------------------------
//ENTITY DATA FIELDS 
//----------------------------------------------------------------------    
@Column(name="ESTATUS")
private Integer estatus       ;
//----------------------------------------------------------------------
//ENTITY LINKS ( RELATIONSHIP )
//----------------------------------------------------------------------
@ManyToOne
@JoinColumn(name="IDUSER", referencedColumnName="IDUSER")
private User user;
@OneToMany(mappedBy="questionary", targetEntity=Answer.class)
private List<Answer> answers;
//----------------------------------------------------------------------
//CONSTRUCTOR(S)
//----------------------------------------------------------------------
public Questionary()
{
super();
}
//----------------------------------------------------------------------
//GETTERS & SETTERS FOR FIELDS
//----------------------------------------------------------------------
//--- DATABASE MAPPING : IDNSE ( NUMBER ) 
public void setIdnse( Integer idnse )
{
this.idnse = idnse;
}
public Integer getIdnse()
{
return this.idnse;
}
//--- DATABASE MAPPING : ESTADO ( NUMBER ) 
public void setEstatus Integer estatus )
{
this.estatus = estatus;
}
public Integer getEstatus()
{
return this.estatus;
}      
//----------------------------------------------------------------------
//GETTERS & SETTERS FOR LINKS
//----------------------------------------------------------------------
public void setUser( Usuario user )
{
this.user = user;
}
public User getUser()
{
return this.user;
}
public void setAnswers( List<Respuesta> answers )
{
this.answers = answer;
}
public List<Answer> getAnswers()
{
return this.answers;
}
//Get Complete Object method      public List<Answer>
getAnswerComplete() {
List<Answer> answers = this.answers;
return answers;
}
}

Ma Réponse Entité:

 @Entity @Table(name="ANSWER", schema="enco" ) public class Answer
implements Serializable {
private static final long serialVersionUID = 1L;
//----------------------------------------------------------------------
//ENTITY PRIMARY KEY ( BASED ON A SINGLE FIELD )
//----------------------------------------------------------------------
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEC_ANSWER")
@SequenceGenerator(name = "SEC_ANSWER", sequenceName = "ENCOADMIN.SEC_ANSWER", allocationSize = 1)
@Column(name="IDANS", nullable=false)
private Integer idans        ;
//----------------------------------------------------------------------
//ENTITY DATA FIELDS 
//----------------------------------------------------------------------    
@Column(name="IMG", length=100)
private String     img       ;
//----------------------------------------------------------------------
//ENTITY LINKS ( RELATIONSHIP )
//----------------------------------------------------------------------
@ManyToOne
@JoinColumn(name="IDQUES", referencedColumnName="IDQUES")
private Questionary questionary  ;
@OneToMany(mappedBy="answer", targetEntity=Reply.class)
private List<Reply> replies;
@ManyToOne
@JoinColumn(name="IDQUE", referencedColumnName="IDQUE")
private Question Question    ;
//----------------------------------------------------------------------
//CONSTRUCTOR(S)
//----------------------------------------------------------------------
public Answer()
{
super();
}
//----------------------------------------------------------------------
//GETTER & SETTER FOR THE KEY FIELD
//----------------------------------------------------------------------
public void setIdans( Integer idans )
{
this.idans = idans ;
}
public Integer getIdans()
{
return this.idans;
}
//----------------------------------------------------------------------
//GETTERS & SETTERS FOR FIELDS
//----------------------------------------------------------------------
//--- DATABASE MAPPING : IMAGEN ( VARCHAR2 ) 
public void setImg( String img )
{
this.img = img;
}
public String getImg()
{
return this.img;
}
//----------------------------------------------------------------------
//GETTERS & SETTERS FOR LINKS
//----------------------------------------------------------------------
public void setQuestionary( Questionary questionary )
{
this.questionary = questionary;
}
public Questionary getQuestionary()
{
return this.questionary;
}
public void setReplies( List<Reply> contestaciones )
{
this.replies = replies;
}
public List<Reply> getReplies()
{
return this.replies;
}
public void setQuestion( Question question )
{
this.question = question;
}
public Question getQuestion()
{
return this.question;
}
}

Et c'est la console d'erreur:

Caused by: com.fasterxml.jackson.databind.JsonMappingException:
Template must not be null or empty! (through reference chain:
project.models.Questionary["answers"])  at
com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:232)
~[jackson-databind-2.3.3.jar:2.3.3]    at *snip*