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Hibernation: Foreign Key Violation Problem

I have com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException in my code (using Hibernate and Spring) and I cannot understand why. My entities are Corpus and Semspace, and there is a lot, one relationship from Semspace to Corpus, as defined in my hibernation mapping configuration:

<class name="xxx.entities.Semspace" table="Semspace" lazy="false" batch-size="30">
    <id name="id" column="idSemspace" type="java.lang.Integer" unsaved-value="null">
        <generator class="identity"/>
    </id>
    <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" />
    <many-to-one name="corpus" class="xxx.entities.Corpus" column="idCorpus"
                insert="false" update="false" />
    [...]
</class>
<class name="xxx.entities.Corpus" table="Corpus" lazy="false" batch-size="30">
    <id name="id" column="idCorpus" type="java.lang.Integer" unsaved-value="null">
        <generator class="identity"/>
    </id>
    <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" />
</class>

And the Java code throwing the exception:

Corpus corpus = Spring.getCorpusDAO().getCorpusById(corpusId);
Semspace semspace = new Semspace();
semspace.setCorpus(corpus);
semspace.setName(name);
Spring.getSemspaceDAO().save(semspace);

I checked and the corpus variable is not null (so it is in the database obtained using the DAO) Full exception:

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`xxx/Semspace`, CONSTRAINT `FK4D6019AB6556109` FOREIGN KEY (`idCorpus`) REFERENCES `Corpus` (`idCorpus`))
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3249)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:642)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:373)
at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639)
at xxx.dao.impl.AbstractDAO.save(AbstractDAO.java:26)
at org.apache.jsp.functions.semspaceManagement_jsp._jspService(semspaceManagement_jsp.java:218)
[...]

The foreign key constraint was created (and added to the database) by sleep mode, and I do not see where the constraint could be violated. The innodb table, and I tried to delete all the tables and recreate it, the problem remains ...

EDIT: , , ... DEBUG,

insert into Semspace (name, [...]) values (?, [...])

, , idCorpus , , "0", Corpus...

+5
5

, . , idCorpus , Corpus/idCorpus.

, , . , .

, Java- , , , , Semspace, .

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (diaz/Semspace, CONSTRAINT FK4D6019AB6556109 (idCorpus) Corpus (idCorpus)) >

+1

, , , .

:

<many-to-one name="corpus" class="xxx.entities.Corpus" column="idCorpus"
            insert="false" update="false" />

You should change the second line to:

<many-to-one name="corpus" class="xxx.entities.Corpus" column="idCorpus"
            cascade="save-update" not-null="true" insert="true" />
+1
source

An old post that I know, but I had it and fixed it by changing @ManyToMany to @OneToMany if the other side is @ManyToOne.

0
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