Question

我有一个非常简单的类User，它应该创建包含用户信息和登录详细信息的用户对象。

package com.example.domain;
import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Relationship;

import java.util.HashSet;
import java.util.Set;

@NodeEntity
public class User {

public User() {}

@GraphId
private Long id;

private String username;
private String password;
private String name;
private String email;
private String Role;

@Relationship(type="BELONGS_TO", direction = Relationship.INCOMING)
Set<Item> items = new HashSet<>();

public User(String name, String username, String password, String email) {
    this.name = name;
    this.username = username;
    this.password = password;
    this.email = email;
}

// Getters and setters below for private fields...
}

创建对象的控制器如下所示：

@RequestMapping(value = "/register",method = RequestMethod.POST)
public String register(Model model,
                       @ModelAttribute(value="name") String name,
                       @ModelAttribute(value="username") String username,
                       @ModelAttribute(value="email") String email,
                       @ModelAttribute(value="password") String password,
                       @ModelAttribute(value="confirmPassword") String confirmPassword) {

    if(!password.equals(confirmPassword)) {
        model.addAttribute("error", true);
        return "register";
    }
    User userEntity=new User(name,username,password,email);
    userManagementService.save(userEntity); //<------The object is created but the error occures during persistance
    return "login";
}

我的用户管理服务如下：

public interface UserManagementService {

List<User> listAll();
User save(User user);

User findUser(String username);
}

什么是User类，而不是persistable类的实例。持久化类的特征是什么？如何使用户成为可持续的类？

Answer 1

您是否在某处配置了OGM？在Java配置中还是在ogm.properties文件中？您需要指定驱动程序类型并告诉SessionFactory在哪里查找您的域对象。

OGM配置参考：https://neo4j.com/docs/ogm-manual/2.1/reference/#reference:configuration SessionFactory配置参考：https://neo4j.com/docs/ogm-manual/2.1/reference/#reference:connecting:session-factory

对象不是使用Spring引导和Neo4j

1 个答案: