Hibernate:行被另一个事务更新或删除(或者未保存值映射不正确)

首先抱歉。我知道有很多相同的话题，但可能是我的英语不好，或者是我没有找到正确的答案。

我使用乐观锁定@Version注释。我需要一个来自一个表的一行有许多来自不同表的行我这样插入:

所以它应该是这样的

Institution(这是我的表(Institution)中的一行)

       - CreationDate A (this is row from different table(CreationDate) bind with Institution with JoinTable, ManyToMany)
       - CreationDate B (this is row from different table(CreationDate) bind with Institution with JoinTable, ManyToMany)
       - CreationDate C (this is row from different table(CreationDate) bind with Institution with JoinTable, ManyToMany)

所以，为了把这个CreationDate放在不同的变体中，我决定手动为我想添加我的CreationDate的特定机构添加id。

我的主方法类:

CreationDate crdate = new CreationDate();   
Institution inst= new Institution();
Set<Institution> instituset = new HashSet<Institution>();
***inst.setInstitutionId(2);***
inst.setNameOfInstitution("MyInstitution");
inst.setTypeName("Education");
instituset.add(inst);

当我想要附加到我的机构的另一行数据后，首先插入我的版本行数据库更改为一个。

这里是我的机构实体:

@Entity
@Table(name="INSTITUTION")
public class Institution implements Serializable{

    private static final long serialVersionUID = -7636394097858726922L;
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="INSTITUTION_ID")
    private int institutionId;

    @Version
    @Column(name="VERSION")
    private int version;

    @Column(name="NAME_INSTITUTION")
    private String nameOfInstitution;
    @Column(name="TYPE_NAME")
    private String typeName;

    @ManyToMany(mappedBy="institution", fetch = FetchType.LAZY)
    @Cascade(org.hibernate.annotations.CascadeType.ALL)
    private Set<CreationDate> creationDate = new HashSet<CreationDate>();
    //getter and setter methods ommited
    public String toString() {
        return institutionId + " , " + nameOfInstitution + " , " + typeName 
    }       
}

和createdate实体:

@Entity
@Table(name="CREATION_DATE")
public class CreationDate implements Serializable {

    private static final long serialVersionUID = 1648102358397071136L;
    @Id
    @GeneratedValue(strategy=IDENTITY)
    @Column(name="DATE_ID")
    private int dateId;

    @Column(name="PARTICULAR_DATE")
    private Date particularDate;
    @Version
    @Column(name="VERSION")
    private int version;
    @Temporal(TemporalType.DATE)
    @Column(name="CHILD_GO_SCHOOL_DATE")
    private Date childGoSchoolDate;
    @Temporal(TemporalType.DATE)
    @Column(name="CHILD_ADMISSION_DATE")
    private Date childAdmissionDate;

    @ManyToMany(fetch = FetchType.LAZY)
    @Cascade(org.hibernate.annotations.CascadeType.ALL)
    @JoinTable(name="CREATIONDATE_INSTITUTION", 
                                    joinColumns=@JoinColumn(name="DATE_ID"), 
                    inverseJoinColumns=@JoinColumn(name="INSTITUTION_ID"))
    private Set<Institution> institution = new HashSet<Institution>();
    @OneToMany(fetch=FetchType.EAGER, orphanRemoval=true)
    @Cascade(org.hibernate.annotations.CascadeType.ALL)
    @JoinTable(name="SRC_DATE", joinColumns=@JoinColumn(name="DATE_ID"),
                    inverseJoinColumns=@JoinColumn(name="SRC_ID"))
    private List<ScheduleRotationChild> scheduleRotationChild = new ArrayList<ScheduleRotationChild>();

        //getter and setter methods ommited

    public String toString() {
        return  dateId + " , " 
            + particularDate + " , " 
            + childGoSchoolDate + " , " 
            + childAdmissionDate + "  " + scheduleRotationChild ;
    }
}

我的道:

public CreationDate insertData(CreationDate creationdate) {
        sessionFactory.getCurrentSession().saveOrUpdate(creationdate);
        log.info(creationdate.getDateId());
        return creationdate;
    }

因此，当我第二次尝试将数据插入到我的Institution时，就会出现异常。

 Hibernate: insert into CREATION_DATE (CHILD_ADMISSION_DATE,
 CHILD_GO_SCHOOL_DATE, PARTICULAR_DATE, VERSION) values (?, ?, ?, ?)
 Hibernate: insert into SCHEDULE_ROTATION_CHILD (CHILD_ADMITTED,
 CHILD_GO_SCHOOL, CHILD_UNDER_3_YEARSOLD, CHILD_UPPER_3_YEARSOLD,
 DAY_SCHEDULE, NUMBER_OF_CHILD, ROTATION, VERSION, WORK_SCHEDULE)
 values (?, ?, ?, ?, ?, ?, ?, ?, ?)
 Hibernate: update INSTITUTION set
 NAME_INSTITUTION=?, TYPE_NAME=?, VERSION=? where INSTITUTION_ID=? and
 VERSION=? Exception in thread "main"
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException:
     Object of class [edu.demidov.dom.Institution] with identifier [2]:
     optimistic locking failed; nested exception is
     org.hibernate.StaleObjectStateException: Row was updated or deleted by
    another transaction (or unsaved-value mapping was incorrect):
     [edu.demidov.dom.Institution#2]

我遇到了同样的问题，这是春天和冬眠的结合。在头疼了3-4个小时后，我只是随机检查了一下我的专栏。由于我使用的是一个旧表，我最近引入了版本列，并且没有默认为零-所以它为所有行和我试图删除的行添加了null。所以就像我猜的那样，我输入了0，它在下一次运行中神奇地工作了。

如果我理解正确，您正在尝试将ID为2的现有Institution添加到新的creatationdate。由于该机构已经存在，您不应该创建一个新的机构。您应该简单地从Hibernate会话中获取:

Institution institution = (Institution) session.load(Institution.class, 2);
creationDate.addInstitution(institution);

检查将要更新的模型对象。基本上你应该检查你的"非空"值;比如已经定义的和主键等。

对我来说，问题是我总是使用相关JpaRepository的save方法而不首先获取现有实体。因此，第一次保存总是很顺利，但当我更新实体时，抛出了异常。我检查了数据库中的version列，发现版本永远不会超过1。确保在更新实体之前总是尝试获取它!

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