use*_*755 3 java dao hibernate hibernate-mapping
首先抱歉.我知道它有很多相同的主题,但也许我的英语不好或者我找不到正确的答案.
我使用乐观锁定@Version注释.我需要从一个表中有一个一行有来自不同表的众多行,我确实插入了这样的:
所以它必须如下所示:
机构(这是我表中的一行(机构))
Run Code Online (Sandbox Code Playgroud)- 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)
因此,为了使这个CreationDate具有不同的变化,我决定手动为我想要添加我的CreationDate的特定机构添加id.
我的主要方法类:
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);
Run Code Online (Sandbox Code Playgroud)
当我想要附加到我的机构的另一行数据时,我在我的代码中添加了用星号标记的行.首先在数据库中插入我的版本行变为一行.
这是我的机构实体:
@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
}
}
Run Code Online (Sandbox Code Playgroud)
我的CreatioDate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 ;
}
}
Run Code Online (Sandbox Code Playgroud)
我的道:
public CreationDate insertData(CreationDate creationdate) {
sessionFactory.getCurrentSession().saveOrUpdate(creationdate);
log.info(creationdate.getDateId());
return creationdate;
}
Run Code Online (Sandbox Code Playgroud)
因此,当我尝试将我的数据插入到我的机构的secont时间时发生异常.
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]
Run Code Online (Sandbox Code Playgroud)
Vik*_*hra 13
我遇到了同样的问题,它是spring和hibernate的结合.在打破我的头3-4个小时之后,我只是随机检查了与版本相关的专栏.当我使用旧表时,我最近引入了版本列,并且没有默认为零 - 所以它已添加null了所有行和我试图删除的行.所以就像猜测我输入0,神奇地它在下一次运行时起作用.我希望有所帮助.
| 归档时间: |
|
| 查看次数: |
52605 次 |
| 最近记录: |