Hello Stack溢出,
我遇到以下问题:
我有以下实体类:
public class UnknownEntity extends NetworkEntity{
@Id
@GeneratedValue(strategy = UuidStrategy.class)
private String id;
@Override
public void setId(String id) {
this.id = id;
}
@Override
public String getId() {
return id;
}
}
@NodeEntity
public class NetworkEntity {
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Id
protected String id;
public List<NetworkInterfaceEntity> getInterfaces() {
return interfaces;
}
public void setInterfaces(List<NetworkInterfaceEntity> interfaces) {
this.interfaces = interfaces;
}
@Relationship(type = "is_composed_of")
protected List<NetworkInterfaceEntity> interfaces ;
}
@NodeEntity
public class NetworkInterfaceEntity {
public String getInterfaceId() {
return interfaceId;
}
public void setInterfaceId(String interfaceId) {
this.interfaceId = interfaceId;
}
public String getIpAddress() {
return ipAddress;
}
public void setIpAddress(String ipAddress) {
this.ipAddress = ipAddress;
}
public String getNetmask() {
return netmask;
}
public void setNetmask(String netmask) {
this.netmask = netmask;
}
public String getMacAddress() {
return macAddress;
}
public void setMacAddress(String macAddress) {
this.macAddress = macAddress;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public InterfaceState getState() {
return state;
}
public void setState(InterfaceState state) {
this.state = state;
}
public List<NetworkInterfaceEntity> getSubInterfaces() {
return subInterfaces;
}
public void setSubInterfaces(List<NetworkInterfaceEntity> subInterfaces) {
this.subInterfaces = subInterfaces;
}
public long getBytesSent() {
return bytesSent;
}
public void setBytesSent(long bytesSent) {
this.bytesSent = bytesSent;
}
public long getBytesRecived() {
return bytesRecived;
}
public void setBytesRecived(long bytesRecived) {
this.bytesRecived = bytesRecived;
}
@Id
private String interfaceId;
private String ipAddress;
private String netmask;
private String macAddress;
private String name;
private InterfaceState state;
@Relationship(type = "is_composed_of")
private List<NetworkInterfaceEntity> subInterfaces;
private long bytesSent;
private long bytesRecived;
}
当我现在尝试使用自定义@Query方法通过Neo4j Crud存储库查询UnknownEntities时,UnknownEntities将不会与必要的NetworkInterfaceObjects嵌套,即使我的查询很难返回这些信息。
public interface UnknownEntityRepository extends CrudRepository<UnknownEntity,String> {
@Query("MATCH (u:UnknownEntity)-[:is_composed_of]->(i:NetworkInterfaceEntity) WHERE i.ipAddress IN {0} WITH u as unknown MATCH p=(unknown)-[r*0..1]-() RETURN collect(unknown),nodes(p),rels(p)")
List<UnknownEntity> searchMachinesByIp(List<String> ipAddresses);
}
在这种特殊情况下,NetworkInterfaceEntities不包含更多的subInterfaces,因此我只希望属于UnknownEntity的NetworkInterfaceEntities。但是,当我使用此查询时,我只会得到UnknownEntities,其中NetworkInterfaceList为null。我什至尝试了不同的查询,但无济于事: “ MATCH p =(u:UnknownEntitie)-[:is_composed_of]-(n:NetworkInterfaceEntity)在{0}中的n.ipAddress处返回collect(n),nodes(p),rels(p)”。
我的问题是,如果使用SDN4 Data甚至可以实现我想要的,那我该如何实现呢,因为我的选择是分别查询每个NetworkInterface的数据库,这确实很丑。
任何帮助将不胜感激。
答案 0 :(得分:0)
请尝试返回以下完整路径:
varchar
为您服务。如果不是,请尝试命名有问题的对象,即md5
对您有用。
您是否正在使用Spring Data Neo4j 4或5?如果您使用的是4,请考虑将升级到5处于受支持的级别。
如果有帮助,请告诉我。