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POCaused by: com.sybase.jdbc2.jdbc.SybSQLException: The column detail_id in table exam does not allow null values
 

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  1. POCaused by: com.sybase.jdbc2.jdbc.SybSQLException: The column detail_id in table exam does not allow null values
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    <p>I have two tables between which I am trying to establish a 1-to-1 mapping using Hibernate.</p> <p><strong>ExamDetail.java</strong></p> <pre><code>package com.hibernate.mapping; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="exam_detail") public class ExamDetail { private int id; private String fullName; private int numberOfQuestions; private int passingPercentage; @Id @GeneratedValue @Column(name="id") public int getId() { return id; } public void setId(int id) { this.id = id; } public String getFullName() { return fullName; } public void setFullName(String fullName) { this.fullName = fullName; } public int getNumberOfQuestions() { return numberOfQuestions; } public void setNumberOfQuestions(int numberOfQuestions) { this.numberOfQuestions = numberOfQuestions; } public int getPassingPercentage() { return passingPercentage; } public void setPassingPercentage(int passingPercentage) { this.passingPercentage = passingPercentage; } } </code></pre> <p><strong>Exam.java</strong></p> <pre><code>package com.hibernate.mapping; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.OneToOne; import javax.persistence.Table; @Entity @Table(name="exam") public class Exam { private int id; private String shortName; private ExamDetail detail; @Id @GeneratedValue @Column(name="id") public int getId() { return id; } public void setId(int id) { this.id = id; } public String getShortName() { return shortName; } public void setShortName(String shortName) { this.shortName = shortName; } @OneToOne(cascade=CascadeType.PERSIST) @JoinColumn(name="detail_id") public ExamDetail getDetail() { return detail; } public void setDetail(ExamDetail detail) { this.detail = detail; } } </code></pre> <p><strong>TestMapping.java</strong></p> <pre><code>package com.hibernate.mapping; import org.hibernate.Session; import com.hibernate.util.HibernateUtil; public class TestMapping { public static void main(String[] args) { Session session = HibernateUtil.beginTransaction(); Exam exam = new Exam(); exam.setShortName("SCJA"); ExamDetail detail = new ExamDetail(); detail.setFullName("Sun Certified Associate"); detail.setNumberOfQuestions(50); detail.setPassingPercentage(60); exam.setDetail(detail); session.save(exam); HibernateUtil.commitTransaction(); } } </code></pre> <p>When I ran this code, I encounter following exception :-</p> <blockquote> <p><strong>Exception in thread "main" org.hibernate.exception.ConstraintViolationException: could not insert: [com.hibernate.mapping.Exam]</strong> at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2186) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2666) at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210) at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195) at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342) at $Proxy14.save(Unknown Source) at com.hibernate.mapping.TestMapping.main(TestMapping.java:22) Caused by: <strong>com.sybase.jdbc2.jdbc.SybSQLException: The column detail_id in table exam does not allow null values.</strong></p> <p>at com.sybase.jdbc2.tds.Tds.processEed(Tds.java:2535) at com.sybase.jdbc2.tds.Tds.nextResult(Tds.java:1916) at com.sybase.jdbc2.jdbc.ResultGetter.nextResult(ResultGetter.java:69) at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:201) at com.sybase.jdbc2.jdbc.SybStatement.nextResult(SybStatement.java:182) at com.sybase.jdbc2.jdbc.SybStatement.executeLoop(SybStatement.java:1596) at com.sybase.jdbc2.jdbc.SybStatement.execute(SybStatement.java:1588) at com.sybase.jdbc2.jdbc.SybPreparedStatement.execute(SybPreparedStatement.java:580) at org.hibernate.id.IdentityGenerator$InsertSelectDelegate.executeAndExtract(IdentityGenerator.java:138) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57) ... 22 more</p> </blockquote> <p>What am I doing wrong ? </p> <p>Any missing statement ?</p>
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    1. COYou need a [SSCE](http://sscce.org/). (Short, Self Contained, Correct (Compilable), Example)
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      1. POCaused by: com.sybase.jdbc2.jdbc.SybSQLException: The column detail_id in table exam does not allow null values
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    2. COI am trying to run this example from book - Hibernate made easy chapter 17 : One to one association
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