我正在使用 Spring Boot 和 Thymeleaf 开发一个应用程序,其中有一个 Package 类和一个 User 类。
封装类别:
@Entity
@Table(name = "table_package")
public class Package {
@Id
@GenericGenerator(name = "gen_id", strategy = "increment")
@GeneratedValue(generator = "gen_id")
private Integer id;
@ManyToOne
@JoinColumn(name = "userid")
@JsonBackReference
private User package_owner;
// private Integer userid;
private String package_name;
@OneToMany(mappedBy = "pkg")
@JsonBackReference
private Set<Article> articles;
@ManyToOne
@JoinColumn(name = "package_statusid")
@JsonBackReference
private PackageStatus packageStatus;
// private Integer package_statusid;
private String notes;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public User getPackage_owner() {
return package_owner;
}
public void setPackage_owner(User package_owner) {
this.package_owner = package_owner;
}
// public Integer getUserid() {
// return userid;
// }
//
// public void setUserid(Integer userid) {
// this.userid = userid;
// }
public String getPackage_name() {
return package_name;
}
public void setPackage_name(String package_name) {
this.package_name = package_name;
}
public Set<Article> getArticles() {
return articles;
}
public void setArticles(Set<Article> articles) {
this.articles = articles;
}
public PackageStatus getPackageStatus() {
return packageStatus;
}
public void setPackageStatus(PackageStatus packageStatus) {
this.packageStatus = packageStatus;
}
public String getNotes() {
return notes;
}
public void setNotes(String notes) {
this.notes = notes;
}
@Override
public String toString() {
return "Package{" +
"id=" + id +
", package_owner=" + package_owner +
", package_name='" + package_name + '\'' +
", articles=" + articles +
", packageStatus=" + packageStatus +
", notes='" + notes + '\'' +
'}';
}
}
用户类别:
@Entity
@Table(name = "table_user")
public class User {
@Id
@GenericGenerator(name="gen_id" , strategy="increment")
@GeneratedValue(generator="gen_id")
private Integer id;
@OneToMany(mappedBy = "package_owner")
@JsonBackReference
private Set<Package> packages = new HashSet<Package>();
}
我正在为包装说明书编写一个屏幕
包添加/插入:
<form action="#" th:action="@{/packages/add}" th:object="${Package}" method="post">
<table class="table stripped-table" id="article-table">
<tr>
<th>
User:
</th>
<td>
<input type="text" id="user-search"/>
<input type="text" th:value="*{user.id}" hidden="hidden" th:required="required"/>
</td>
</tr>
<tr>
<th>
Package:
</th>
<td>
<input type="text" th:field="*{package_name}" th:required="required"/>
</td>
</tr>
</table>
<input type="submit" id="submit" value="Add" />
</form>
在关联它们之间的对象之前,我使用 JavaScript 的自动完成功能在“用户搜索”上写入名称,将值插入到 user_id 输入中,然后将其传递给我的 Controller 。
但是现在我已经创建了两个对象之间的关系,每次尝试加载模板时都会收到此错误:
bean 类 [com.app.model.Package] 的属性“user”无效:Bean 属性“user”不可读或具有无效的 getter 方法:getter 的返回类型与 setter 的参数类型匹配吗?
我一直在研究 getter 和 setter,但找不到问题。我也很好奇应该如何在我的 Controller 上处理返回,但我假设将在数据库上的保存函数之前插入整个对象。有什么想法吗?
提前致谢。
编辑抱歉耽搁了,我正在出差。
这是 Controller :
@RequestMapping(value = "add", method = RequestMethod.GET)
public ModelAndView addPackageForm(Model model){
List<PackageStatus> packageStatuses = packageStatusRepository.findAll();
model.addAttribute("Package", new Package());
model.addAttribute("PackageStatus", packageStatuses);
ModelAndView mav = new ModelAndView("packages/add");
mav.addObject("page_title", "Test: Add Package");
mav.addObject("template_primary", "packages");
mav.addObject("template_secondary", "add");
return mav;
}
最佳答案
您需要使用类的正确字段名称,因此将 user
切换为 package_owner
或者正如您在评论中所做的那样,您可以执行相反的操作。
关于java - Thymeleaf + Spring Boot : Object creation with related object (Form & Return),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44977135/