我有两个模型，UserModel和RoleModel，它们用@OneToOne关系Map。当我更新用户详细信息时，它首先将数据插入角色表，然后将这些新角色更新为UserModel。

用户模型.java

package com.example.demo.Model;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Table;

@Entity
@Table(name="Users")
public class UserModel {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name="id")
  private Integer id;

  @Column(name="name")
  private String name;

  @Column(name="address")
  private String address;
  @JoinColumn(name = "role", insertable=false, nullable = false, updatable = false)
  @OneToOne(cascade = CascadeType.ALL)
  private RoleModel roleModel;

  public UserModel() {
  }

  public UserModel(Integer id, String name, String address,RoleModel roleModel) {
    super();
    this.id = id;
    this.name = name;
    this.address = address;
    this.roleModel = roleModel;
  }

  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getAddress() {
    return address;
  }
  public void setAddress(String address) {
    this.address = address;
  }
  public RoleModel getRoleModel() {
    return roleModel;
  }
  public void setRoleModel(RoleModel roleModel) {
    this.roleModel = roleModel;
  }
}

角色模型.java

package com.example.demo.Model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

@Entity
@Table(name="Roles")
public class RoleModel {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  @Column(name="role")
  private Integer role;

  @Column(name="rolename")
  private String roleName;

  @OneToOne(mappedBy = "roleModel")
  private UserModel userModel;

  public RoleModel() {
  }

  public RoleModel(Integer role, String roleName) {
    super();
    this.role = role;
    this.roleName = roleName;
  }

  public Integer getRole() {
    return role;
  }
  public void setRole(Integer role) {
    this.role = role;
  }
  public String getRoleName() {
    return roleName;
  }
  public void setRoleName(String roleName) {
    this.roleName = roleName;
  }
}

我想更新UserModel和角色，但是这里RoleModel插入了一个新行，然后它就更新了。请帮助我解决这个问题。告诉我应该使用的确切代码，以便只更新来自UserModel关联角色的数据。