Question

我有两个实体。 User.java，DirectReport.java

User.java
*************************************
@Entity
@Table(name = "User")
@JsonInclude(Include.NON_NULL)
public class User{
 .....
 ......
    @OneToMany(fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.DETACH,
        CascadeType.REMOVE  })
@JoinColumn(name = "user_code", referencedColumnName = "code")
public List<DirectReports> getDirectReports() {
    return directReports;
}

public void setDirectReports(List<DirectReports> directReports) {
    this.directReports = directReports;
}
}

DirectReport.java
****************************
@ManyToOne(optional=true)
@JoinColumn(name = "directreport_code", referencedColumnName = "code", insertable = false, updatable = false)
public User getDirectReport() {
    return directReport;
}

public void setDirectReport(User directReport) {
    this.directReport = directReport;
}

@Column(name="directreport_code")
public String getDirReportCode() {
    return dirReportCode;
}

public void setDirReportCode(String dirReportCode) {
    this.dirReportCode = dirReportCode;
}

数据插入子表中。 user_code列也会更新。但是directreports_code字段设置为null。任何人都可以帮忙吗？

编辑：更新数据库如下：

UserService.java
***********************************
User userVar;
DirectReports dr;
   for (String str : model.getDirectReportsCode()) {
   userVar = repository.findByCodeIgnoreCase(str);
   System.out.println("userVar "+userVar.getCode());
   dr = new DirectReports();
   if (userVar != null) {
   dr.setDirReportCode(userVar.getCode());
   list.add(dr);
    }
}
    System.out.println("list " + list);
    model.setDirectReports(list);
    toBeApprovedModel2 = getMainRepository().save(model);
    getMainRepository().flush();
    postApprove(toBeApprovedModel2);

注意：model.getDirectReportsCode（）是一个字符串。我正在迭代，找到相应的用户，将其添加到列表中并将其设置在模型对象中。我可以在“getMainRepository（）。save（model）”中看到dirReportCode字段的值。

Answer 1

在UserService.java尝试设置userVar对象上的dr

if (userVar != null) {
   dr.setDirReportCode(userVar.getCode());
   dr.setDirectReport(userVar);  // <----- do this

 //rest of your code

<强>更新

在User实体中更改以下内容：

    @OneToMany(fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.DETACH,
        CascadeType.REMOVE  })
@JoinColumn(name = "user_code", referencedColumnName = "code")
public List<DirectReports> getDirectReports() {
    return directReports;
}

收件人（请注意添加mappedBy属性并删除@JoinColumn）：

@OneToMany(fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.DETACH,
            CascadeType.REMOVE  }, mappedBy="directReport")
public List<DirectReports> getDirectReports() {
    return directReports;
}

Answer 2

我没有在服务器端构建直接报告，而是构建了客户端本身的对象并保存在其中，我面对任何问题。然而，我不知道为什么在服务器端构建对象并不起作用。

Spring数据jpa - 具有表示未插入的相同表字段的另一个外键的实体实体

2 个答案: