通过 hibernate 映射将数据插入数据库表失败
[英]inserting data into database table via hibernate mapping fails
问题描述
I am using Hibernate to insert a row into a database, I am using Visual Paradigm (Enterprise Edition) to generate database tables.
我正在使用 Hibernate 向数据库中插入一行，我正在使用 Visual Paradigm（企业版）生成数据库表。
Here are the errors这是错误
org.orm.PersistentException: org.hibernate.PropertyValueException: not-null property references a null or transient value: com.patientmanagement.model.Patient.visitRecord at org.orm.PersistentSession.saveOrUpdate(PersistentSession.java:631) at org.orm.PersistentManager.saveObject(PersistentManager.java:287) at com.patientmanagement.model.PatientDAO.save(PatientDAO.java:303) at com.test.InsertData.main(InsertData.java:28) Caused by: org.hibernate.PropertyValueException: not-null property references a null or transient value: com.patientmanagement.model.Patient.visitRecord at org.hibernate.engine.Nullability.checkNullability(Nullability.java:100) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:312) at org.hibernate.event.def.A
And here is the Insert function to test这是要测试的插入 function
public class InsertData {
public static void main(String[]args) throws PersistentException
{
PersistentTransaction trans=PatientmanagementPersistentManager.instance().getSession().beginTransaction();
try
{
//create patient instance
Patient patient=PatientDAO.createPatient();
//set patients properties
patient.setName("Markus Rosevelt");
patient.setRegisterDate(new Date());
//save patient
PatientDAO.save(patient);
trans.commit();
}catch(Exception e){
trans.rollback();
}
}
}
2 个解决方案
解决方案1
1 已采纳 2012-04-06 07:51:23
you might have defined the column visitRecord as NOT NULL on your database and now you are trying to insert a null value on that column, or your mapping is not correct, can you show your mapping and your table definition?您可能在数据库中将列 visitRecord 定义为 NOT NULL，现在您正试图在该列上插入一个 null 值，或者您的映射不正确，您可以显示您的映射和表定义吗？
解决方案2
0 2012-04-06 07:46:05
This message means that you cannot create a Patient entity with an empty property.此消息意味着您不能创建具有空属性的 Patient 实体。 The empty property in this case is the visitRecord property within the Patient entity.本例中的空属性是 Patient 实体中的 visitRecord 属性。 You can assign a value to this property using something like您可以使用类似的方式为此属性分配一个值
patient.setVisitRecord(some values);
I hope this solves your problem.我希望这能解决你的问题。
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