实体中的spring数据neo4j关系

Question

图像我有以下实体：公司和员工，带有Spring数据neo4j注释：

Company.java

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

受雇者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;
    ......
}

那么如何保留Company和Person中的引用呢？

Company.java

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

或

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

人JAVA

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

或

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

Answer 1

你必须在Company中声明（通过雇员Rel与雇员的传出关系）

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

和雇员中的相反：

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

请注意，这里您选择了使关系在双方都可导航，但这不是强制性的。它还可以使其仅从公司或员工导航。