spring-boot - 明确定义RelationshipEntity后，别忘了更改模型吗？

使用下面在sdn5应用程序中的域类，我可以创建人员并将其存储在neo4j中。
从数据库的 Angular 来看，一切都很好(存在节点和关系)。

import com.fasterxml.jackson.annotation.JsonIgnore
import com.fasterxml.jackson.annotation.JsonIgnoreProperties
import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.annotation.ObjectIdGenerators
import org.neo4j.ogm.annotation.*

@NodeEntity(label = "Person")
data class Person(
        @Id
        @GeneratedValue
        private var id: Long?,

        @Index
        private var email: String,

        @Property var firstName: String,

        @Property var lastName: String,

        @Property var photo: String,

        @Relationship(type = "KNOWS", direction = Relationship.OUTGOING)
        @JsonIgnoreProperties("outgoing")
        private var knows: MutableList<Person>

)

@RelationshipEntity(type = "KNOWS")
data class Knows(
        @Id
        @GeneratedValue
        val id: Long?,

        @StartNode
        private var outgoing: Person,

        @EndNode
        private var incoming: Person
)

但是，当我尝试获取实体时，对于NodeEntities来说一切正常，但是对于带有

java.lang.NullPointerException: null
at org.neo4j.ogm.context.MappingContext.nativeId(MappingContext.java:498) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.MappingContext.remember(MappingContext.java:482) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.MappingContext.addRelationshipEntity(MappingContext.java:283) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.createRelationshipEntity(GraphEntityMapper.java:409) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.mapRelationshipEntity(GraphEntityMapper.java:351) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.mapRelationships(GraphEntityMapper.java:325) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.mapEntities(GraphEntityMapper.java:201) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:132) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]
at org.neo4j.ogm.context.GraphEntityMapper.map(GraphEntityMapper.java:88) ~[neo4j-ogm-core-3.1.0.jar:3.1.0]

如果我删除了RelationshipEntity的显式声明，则一切正常。
我已经用Java类测试过...同样的问题。

我究竟做错了什么？

提前致谢

Github中的完整testCase
帕特里斯

最佳答案

感谢Gerrit Meier(请参阅Github)，当您定义一个RelationshipEntity时，请不要忘记从模型中引用它。
在上面的示例中，我们需要编写:

@NodeEntity(label = "Person")
data class Person(
    @Id
    @GeneratedValue
    private var id: Long?,

    @Index
    private var email: String,

    @Property var firstName: String,

    @Property var lastName: String,

    @Property var photo: String,

    @Relationship(type = "KNOWS", direction = Relationship.OUTGOING)
    @JsonIgnoreProperties("outgoing")
    private var knows: MutableList<Knows>

希望它会有所帮助。