Neo4j RelationshipEntity StackOverflow

Question

我无法理解@RelationshipEntity的工作原理。我尝试了下面的例子，但即使我认为我遵循与例子相同的模式，我最终得到了一个stackoverflow，因为关系实体获取了具有RelationshipEntity的NodeEntity，并且...

我的模式是： (:Vendor)-[:BELONGS_TO {active: true, sinceDate: date}]->(:Store)

所以我的两个节点是供应商和商店：

@NodeEntity 
@Data 
public class Vendor { 

    @GraphId 
    private Long id; 

    private Long vendorId; 

    private String name; 

    private String address; 

    @Relationship(type = "OWNS") 
    private Collection<Inventory> inventory; 

    @Relationship(type = "BELONGS_TO") 
    private Collection<Store> store; 
} 

@NodeEntity 
@Data 
public class Store { 

    @GraphId 
    private Long id; 

    private Long storeId; 

    private String name; 

    private String address; 

    private String email; 

    @Relationship(type = "BELONGS_TO", direction = Relationship.INCOMING) 
    private List<StoreParticipant> storeParticipant; 
} 

而且我RelationshipEntity：

@RelationshipEntity(type = "BELONGS_TO") 
@Data 
public class StoreParticipant { 

    @GraphId 
    private Long id; 

    @StartNode 
    private Vendor vendor; 

    @EndNode 
    private Store store; 

    private int count; 

    private double price; 

    private boolean negotiable; 

    private boolean active; 
} 

我基于这一关其具有电影实例的（：人） - [：ACTED_IN] - >（：MOVIE）和acted_in关系是ROLE

这是当我打电话库方法findByVendorId

发生

@Repository 
public interface VendorRepository extends GraphRepository<Vendor> { 
    List<Vendor> findByVendorId(Long vendorId); 
} 

Answer 1

如果您从两端引用它，则需要引用关系实体，而不是直接引用节点实体。

Store看起来很好，但Vendor包含

@Relationship(type = "BELONGS_TO") 
private Collection<Store> store; 

当它应该是

@Relationship(type = "BELONGS_TO") 
private Collection<StoreParticipant> store;