左結合のあるJPQLクエリ

Question

2つのテーブルを結合するJPQLクエリを作成しようとしていて、その中にデータを設定できました。

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package com.dke.ps.Tables; 

import java.io.Serializable; 
import java.util.Collection; 
import javax.persistence.Basic; 
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.ManyToOne; 
import javax.persistence.NamedQueries; 
import javax.persistence.NamedQuery; 
import javax.persistence.OneToMany; 
import javax.persistence.Table; 
import javax.xml.bind.annotation.XmlRootElement; 
import javax.xml.bind.annotation.XmlTransient; 

/** 
* 
* @author michal 
*/ 
@Entity 
@Table(name = "saves") 
@XmlRootElement 
@NamedQueries({ 
    @NamedQuery(name = "Saves.findAll", query = "SELECT s FROM Saves s") 
    , @NamedQuery(name = "Saves.findBySaveid", query = "SELECT s FROM Saves s WHERE s.saveid = :saveid") 
    , @NamedQuery(name = "Saves.findBySavedata", query = "SELECT s FROM Saves s WHERE s.savedata = :savedata")}) 
public class Saves implements Serializable { 

    private static final long serialVersionUID = 1L; 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Basic(optional = false) 
    @Column(name = "saveid") 
    private Integer saveid; 
    @Column(name = "savedata") 
    private String savedata; 
    @JoinColumn(name = "userid", referencedColumnName = "userid") 
    @ManyToOne(optional = false) 
    private Users userid; 
    @OneToMany(mappedBy = "saveid") 
    private Collection<Users> usersCollection; 

    public Saves() { 
    } 

    public Saves(Integer saveid) { 
     this.saveid = saveid; 
    } 

    public Integer getSaveid() { 
     return saveid; 
    } 

    public void setSaveid(Integer saveid) { 
     this.saveid = saveid; 
    } 

    public String getSavedata() { 
     return savedata; 
    } 

    public void setSavedata(String savedata) { 
     this.savedata = savedata; 
    } 

    public Users getUserid() { 
     return userid; 
    } 

    public void setUserid(Users userid) { 
     this.userid = userid; 
    } 

    @XmlTransient 
    public Collection<Users> getUsersCollection() { 
     return usersCollection; 
    } 

    public void setUsersCollection(Collection<Users> usersCollection) { 
     this.usersCollection = usersCollection; 
    } 

    @Override 
    public int hashCode() { 
     int hash = 0; 
     hash += (saveid != null ? saveid.hashCode() : 0); 
     return hash; 
    } 

    @Override 
    public boolean equals(Object object) { 
     // TODO: Warning - this method won't work in the case the id fields are not set 
     if (!(object instanceof Saves)) { 
      return false; 
     } 
     Saves other = (Saves) object; 
     if ((this.saveid == null && other.saveid != null) || (this.saveid != null && !this.saveid.equals(other.saveid))) { 
      return false; 
     } 
     return true; 
    } 

    @Override 
    public String toString() { 
     return "com.dke.ps.Tables.Saves[ saveid=" + saveid + " ]"; 
    } 

} 

とユーザークラス：

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package com.dke.ps.Tables; 

import java.io.Serializable; 
import java.util.Collection; 
import java.util.Date; 
import javax.persistence.Basic; 
import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.ManyToOne; 
import javax.persistence.NamedQueries; 
import javax.persistence.NamedQuery; 
import javax.persistence.OneToMany; 
import javax.persistence.Table; 
import javax.persistence.Temporal; 
import javax.persistence.TemporalType; 
import javax.xml.bind.annotation.XmlRootElement; 
import javax.xml.bind.annotation.XmlTransient; 

/** 
* 
* @author michal 
*/ 
@Entity 
@Table(name = "users") 
@XmlRootElement 
@NamedQueries({ 
    @NamedQuery(name = "Users.findAll", query = "SELECT u FROM Users u") 
    , @NamedQuery(name = "Users.findByUserid", query = "SELECT u FROM Users u WHERE u.userid = :userid") 
    , @NamedQuery(name = "Users.findByLogin", query = "SELECT u FROM Users u WHERE u.login = :login") 
    , @NamedQuery(name = "Users.findByPassword", query = "SELECT u FROM Users u WHERE u.password = :password") 
    , @NamedQuery(name = "Users.findByEmail", query = "SELECT u FROM Users u WHERE u.email = :email") 
    , @NamedQuery(name = "Users.findByDate", query = "SELECT u FROM Users u WHERE u.date = :date")}) 
public class Users implements Serializable { 

    private static final long serialVersionUID = 1L; 
    @Id 
    @Basic(optional = false) 
    @Column(name = "userid") 
    private Integer userid; 
    @Column(name = "login") 
    private String login; 
    @Column(name = "password") 
    private String password; 
    @Column(name = "email") 
    private String email; 
    @Column(name = "date") 
    @Temporal(TemporalType.DATE) 
    private Date date; 
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "userid") 
    private Collection<Saves> savesCollection; 
    @JoinColumn(name = "saveid", referencedColumnName = "saveid") 
    @ManyToOne 
    private Saves saveid; 

    public Users() { 
    } 

    public Users(Integer userid) { 
     this.userid = userid; 
    } 

    public Integer getUserid() { 
     return userid; 
    } 

    public void setUserid(Integer userid) { 
     this.userid = userid; 
    } 

    public String getLogin() { 
     return login; 
    } 

    public void setLogin(String login) { 
     this.login = login; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    public Date getDate() { 
     return date; 
    } 

    public void setDate(Date date) { 
     this.date = date; 
    } 

    @XmlTransient 
    public Collection<Saves> getSavesCollection() { 
     return savesCollection; 
    } 

    public void setSavesCollection(Collection<Saves> savesCollection) { 
     this.savesCollection = savesCollection; 
    } 

    public Saves getSaveid() { 
     return saveid; 
    } 

    public void setSaveid(Saves saveid) { 
     this.saveid = saveid; 
    } 

    @Override 
    public int hashCode() { 
     int hash = 0; 
     hash += (userid != null ? userid.hashCode() : 0); 
     return hash; 
    } 

    @Override 
    public boolean equals(Object object) { 
     // TODO: Warning - this method won't work in the case the id fields are not set 
     if (!(object instanceof Users)) { 
      return false; 
     } 
     Users other = (Users) object; 
     if ((this.userid == null && other.userid != null) || (this.userid != null && !this.userid.equals(other.userid))) { 
      return false; 
     } 
     return true; 
    } 

    @Override 
    public String toString() { 
     return "com.dke.ps.Tables.Users[ userid=" + userid + " ]"; 
    } 

} 

これらの2つのクラスが自動的にデータベース接続によって生成された

public void uploadSaveGame(User user, String saveData) 
    { 
     EntityTransaction entr=em.getTransaction(); 
     entr.begin(); 

     try{ 
      Query query = em.createQuery("UPDATE Saves s SET s.save = :saveData" + 
"WHERE s.login = :user in (select sa.saveid,sa.Users.login, sa.savedata from Saves sa " 
       + "LEFT JOIN sa.Users m WHERE sa.saves = m.users.saveid)", Save.class); 
     query.setParameter("login", user); 
     query.setParameter("saveData", saveData); 
     query.executeUpdate(); 
     entr.commit(); 

     }catch(Exception e){ 
      entr.rollback(); 
     } 

    } 

私はこのentitesを持っています。だから、そのクエリでは、私は彼らと一緒に作業しなければならないと思うし、データベースのテーブルとは直接関係がありません。それはそうです？

残念ながら、私は、任意の列のデータを編集していない、との問題は私のユーザーエンティティが持つ多くの関係に多くのエンティティを保存してい

ここで私は知りません。

Answer 1

あなたは例外を印刷した場合*あなたはおそらくあなたが:userパラメータを持っていることに気づいただろうが、あなたの代わりに、ログインパラメータ

query.setParameter("login", user);