Myujth

I'm having issues getting a neo4j RelationshipEntity persisted with Spring Boot. I'm using spring-boot-starter-data-neo4j (2.1.0.RELEASE), and the neo4j docker image tagged 3.4.9.

I have a simple NodeEntity, which contains a collection for the RelationshipEntity:

@NodeEntity
public class Book 
 @Id
 @GeneratedValue
 private Long id;
 private String name;

 public Book() 

 public Book(String name) 
 this.name = name;
 

 @Relationship(type = "PURCHASED_WITH", direction = "OUTGOING")
 private Set<BookPurchase> purchases = new HashSet<>();

 // getters and setters follow

I have another NodeEntity, which also contains a collection for the relationship entity:

@NodeEntity
public class CreditCard 

 @Id
 @GeneratedValue
 private Long id;
 private String number;

 @DateString(value = "yyyy-MM-dd")
 private Date expiryDate;

 public CreditCard() 

 public CreditCard(String number, Date expiryDate) 
 this.number = number;
 this.expiryDate = expiryDate;
 

 @Relationship(type = "PURCHASED_WITH", direction = "INCOMING")
 private Set<BookPurchase> purchases = new HashSet<BookPurchase>(); 

 // getters and setters follow

I have the RelationshipEntity, which adds references to both NodeEntity classes in the constructor:

@RelationshipEntity(type = "PURCHASED_WITH")
public class BookPurchase 
 @Id
 @GeneratedValue
 private long id;

 @DateString("yyyy-MM-dd")
 Date purchaseDate;

 @StartNode
 private Book book;

 @EndNode
 private CreditCard card;

 public BookPurchase()

 public BookPurchase(CreditCard card, Book book, Date purchaseDate) 
 this.card = card;
 this.book = book;
 this.purchaseDate = purchaseDate;

 this.card.getPurchases().add(this);
 this.book.getPurchases().add(this);
 
 // getters and setters follow

And finally I have the Spring controller tying everything together:

@RestController
public class ExamplesController 

 @Autowired
 CreditCardRepository creditCardRepository;

 @PostMapping(value="/purchases")
 public String createPurchases() 
 CreditCard card = new CreditCard("11111", new GregorianCalendar(2018, Calendar.FEBRUARY, 12).getTime());

 Book book1 = new Book("of mice and men");
 BookPurchase purchase1 = new BookPurchase(card,book1,new GregorianCalendar(2018, Calendar.MARCH, 15).getTime());

 creditCardRepository.save(card);
 return "Successfully created entities";
 

Whenever I try to curl -X POST http://localhost:8080/purchases, I just see the following in the neo4j browser - the RelationshipEntity is not persisted, only the nodes.

Can anyone assist?

Thanks to Gerrit Meier for answering this one. My RelationshipEntity was using the primitive long instead of the object/wrapper Long. Complete details here: https://community.neo4j.com/t/neo4j-relationshipentity-not-persisted/3039