NEO4J-OGM。错误:将@NodeEntity与其各自的@RelationshipEntity一起保存会导致堆栈溢出(StackOverflowError: null) -陷入循环

Question

我有两个节点和一个关系。(:Device)-:WITH_READING {timestamp}->(：RelationshipEntity )为此，我创建了以下2个节点实体和1个RelationshipEntity。当我使用Neo4jSessionFactory.getInstance().getNeo4jSession().save.保存设备NodeEntity时我得到了StackOverFlow错误，因为它只是在Node和RelationshipEntity之间循环运行。

我怎么才能解决这个问题。

Caused by: java.lang.StackOverflowError: null
at java.base/java.util.HashSet.iterator(HashSet.java:173) ~[na:na]
at java.base/java.util.AbstractSet.hashCode(AbstractSet.java:120) ~[na:na]
at com.path.Device.hashCode(Device.java:12) ~[classes/:na]
at com.path.DeviceReading.hashCode(DeviceReading.java:13) ~[classes/:na]
at java.base/java.util.AbstractSet.hashCode(AbstractSet.java:124) ~[na:na]
at com.path.Device.hashCode(Device.java:12) ~[classes/:na]
at com.path.DeviceReading.hashCode(DeviceReading.java:13) ~[classes/:na]
at java.base/java.util.AbstractSet.hashCode(AbstractSet.java:124) ~[na:na]
at com.path.Device.hashCode(Device.java:12) ~[classes/:na]
at com.path.DeviceReading.hashCode(DeviceReading.java:13) ~[classes/:na]
at java.base/java.util.AbstractSet.hashCode(AbstractSet.java:124) ~[na:na]
at com.path.Device.hashCode(Device.java:12) ~[classes/:na]
at com.path.DeviceReading.hashCode(DeviceReading.java:13) ~[classes/:na]
at java.base/java.util.AbstractSet.hashCode(AbstractSet.java:124) ~[na:na]

@AllArgsConstructor
@NodeEntity(label = "Device")
public class Device {
    @Index
    @Id
    @Property(name="deviceId")
    private String id;

    public Device(String id) {
        this.id = id;
    }

    @Relationship(type = "WITH_READING")
    Set<DeviceReading> deviceReadings;
}


@Data
@AllArgsConstructor
@RelationshipEntity(type = "WITH_READING")
public class DeviceReading {
    private Long id;
    
    @Property(name = "timestamp")
    private long timestamp;

    @JsonIgnore
    @StartNode
    private Device device;
    @EndNode
    private Reading reading;
}


@AllArgsConstructor
@NodeEntity(label = "SensorReading")
public class Reading {
    @Id
    @Property(name="id")
    @GeneratedValue(strategy = UuidGenerator.class)
    @Convert(UUIDConvertor.class)
    private UUID id;

    @Property(name="isExtrapolated")
    private boolean extrapolated;
}

Answer 1

因此，我将@Data lombok注释替换为relationshipEntity = :WITH_READING的@Getter和@Setter。现在它工作得很好。不过，我不知道为什么。