Spring Boot Neo4j @NodeEntity具有Integer属性引发错误

问题描述

当我将数据类型用作字段rowStatusId的Integer / int时，我能够使用.save（）方法将节点保存到neo4j数据库，但同时使用findByName（String name）检索记录时，系统将抛出如下错误发生在“ LineItemStatus status = lineItemStatusRepository.findByName（“ New”）;“服务中）。将数据类型更改为Long时，我没有收到任何错误。

我们不能使用整数吗？还是我需要包括任何其他依赖项？请帮助我。

Caused by: org.neo4j.ogm.exception.core.MappingException: Error mapping GraphModel

Caused by: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.lang.Long] to type [int]

下面是我的代码

import org.neo4j.ogm.annotation.GeneratedValue;
import org.neo4j.ogm.annotation.Id;
import org.neo4j.ogm.annotation.NodeEntity;

@NodeEntity
public class LineItemStatus {
    @Id
    @GeneratedValue
    private Long id;
    private String name;
    private String description;
    private int rowStatusId;

    public LineItemStatus(String name,String description,int rowStatusId) {
        this.name = name;
        this.description = description;
        this.rowStatusId = rowStatusId;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public int getRowStatusId() {
        return rowStatusId;
    }

    public void setRowStatusId(int rowStatusId) {
        this.rowStatusId = rowStatusId;
    }
}

后勤：

import com.ns.tbe.model.nodes.LineItemStatus;
import org.springframework.data.neo4j.repository.Neo4jRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface LineItemStatusRepository extends Neo4jRepository<LineItemStatus,Long> {
    LineItemStatus findByName(String name);
}

服务：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class LineItemStatusService {
    @Autowired
    LineItemStatusRepository lineItemStatusRepository;

    public void saveLineItemStatus() {
        lineItemStatusRepository.save(new LineItemStatus("New","new",1));
        lineItemStatusRepository.save(new LineItemStatus("Modified","modified",1));
        lineItemStatusRepository.save(new LineItemStatus("Deleted","deleted",1));

        LineItemStatus status = lineItemStatusRepository.findByName("New");
    }
}

build.gradle文件：

plugins {
    id 'org.springframework.boot' version '2.3.0.RELEASE'
    id 'io.spring.dependency-management' version '1.0.9.RELEASE'
    id 'java'
}

group = 'com.ns'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

repositories {
    mavenCentral()
}

dependencies {

    implementation 'org.springframework.boot:spring-boot-starter-data-neo4j'
    compile group: 'org.neo4j',name: 'neo4j-ogm-bolt-driver',version: '3.2.11'
    compile group: 'org.apache.commons',name: 'commons-lang3',version: '3.10'
    implementation 'org.springframework.boot:spring-boot-starter'
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage',module: 'junit-vintage-engine'
    }
}

test {
    useJUnitPlatform()
}

应用程序属性：

spring.data.neo4j.uri=bolt://localhost:7687
spring.data.neo4j.username=neo4j
spring.data.neo4j.password=secret

解决方法

驱动程序倾向于将整数存储为long。这是一个很好的详细说明：https://michael-simons.github.io/neo4j-sdn-ogm-tips/understand_the_type_system.html。

为简化起见，您可能需要将rowStatusId更改为long类型。