Neo4j 关系实体 StackOverflow

Question

我无法理解@RelationshipEntity 的工作原理。我尝试了以下示例，但即使我认为我遵循与示例相同的模式，我最终还是遇到了计算器溢出，因为关系实体获取了具有关系实体的 NodeEntity，等等......

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

所以我的两个节点是 Vendor 和 Store:

@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;
}

我的关系实体：

@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;
}

我基于具有 (:Person)-[:ACTED_IN]->(:MOVIE) 的电影示例，并且 acted_in 关系是 ROLE

这是在我调用存储库方法 findByVendorId 时发生的

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

Answer 1

如果从两端引用它，则需要引用关系实体，而不是直接引用节点实体。

Store 看起来不错，但 Vendor 包含

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

什么时候应该

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

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