弹簧数据Neo4j的关系

Question

图片我有以下实体：公司与员工，与弹簧数据Neo4j的注解：

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; 
    ...... 
} 

然后是这些实体的关系实体：

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

那么如何在Company和Person中保留参考？

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（发布给Employee通过EmployeeRel关系）

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

和逆宣布在Employee：

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

注意您选择，这里有通航的关系双方，但它不是强制性的。它也可以使它仅从Company或Employee通航。