彈簧數據Neo4j的關係

Question

圖片我有以下實體：公司與員工，與彈簧數據Neo4j的註解：

Company.java

@NodeEntity(label = "Company") 
public class Company { 
    /** 
    * Graph ID 
    */ 
    @GraphId 
    private Long id; 
    ...... 
} 

Employee.java

@NodeEntity(label = "Employee") 
public class Employee { 
    /** 
    * Graph ID 
    */ 
    @GraphId 
    private Long id; 
    ...... 
} 

然後是這些實體的關係實體：

@RelationshipEntity(type = "EMPLOY") 
public class EmployRel { 
    /** 
    * Graph ID 
    */ 
    @GraphId 
    private Long id; 
    @StartNode 
    private Company company; 
    @EndNode 
    private Employee employee; 
    ...... 
} 

那麼如何在Company和Person中保留參考？

Company.java

@Relationship(type = "EMPLOY", direction = Relationship.OUTGOING) 
private Set<EmployRel> employeeRel = new HashSet<>(); 

OR

@Relationship(type = "EMPLOY", direction = Relationship.OUTGOING) 
private Set<Employee> employee = new HashSet<>(); 

Person.java

@Relationship(type = "EMPLOY", direction = Relationship.INCOMING) 
private Company company = new Company(); 

OR

@Relationship(type = "EMPLOY", direction = Relationship.OUTGOING) 
private EmployRel employRel = new EmployRel(); 

Answer 1

你有Company（發佈給Employee通過EmployeeRel關係）

@Relationship 
public Set<EmployRel> employees = new HashSet<>(); 

和逆宣佈在Employee：

@Relationship(direction = Relationship.INCOMING) 
public HashSet<EmployRel> isEmployedBy = new HashSet<>(); 

注意您選擇，這裏有通航的關係雙方，但它不是強制性的。它也可以使它僅從Company或Employee通航。