| [Teneo] possible bug: object references an unsaved transient instance [message #1702340] |
Tue, 21 July 2015 15:48  |
 Oleg Orlov
Messages: 14
Registered: June 2015 |
Junior Member |
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Hello all!
I have got this famous, but unexpected exception:
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: test.Embedded
My object model:
Emfatic:
class Embedded2 {
attr String[1] name;
}
class Embedded {
attr String[1] name;
val Embedded2[1] value;
}
class Table {
attr String[1] name;
val Embedded[*] content;
}
Now, persist root object Table, create Embedded and Embedded2, try to merge and got the exception, pointed above.
My setup:
-----
hibernate:
<property name="hibernate.dialect">org.hibernate.dialect.PostgreSQL9Dialect</property>
<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
<property name="hibernate.connection.username">postgres</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:postgresql://192.168.2.75:5432/teneo</property>
<property name="hibernate.globally_quoted_identifiers">true</property>
<property name="default_entity_mode">dynamic-map</property>
-----
teneo:
properties.put(PersistenceOptions.MAP_DOCUMENT_ROOT, "true");
properties.put(PersistenceOptions.AUTO_ADD_REFERENCED_EPACKAGES, "true");
properties.put(PersistenceOptions.MAXIMUM_SQL_NAME_LENGTH, "63");
properties.put(PersistenceOptions.SQL_NAME_ESCAPE_CHARACTER, "");
properties.put(PersistenceOptions.CASCADE_POLICY_ON_NON_CONTAINMENT, "REFRESH");
properties.put(PersistenceOptions.FORCE_LAZY, "true");
-----
Generated mapping:
<class entity-name="test.Embedded2" abstract="false" lazy="true" discriminator-value="test.Embedded2" table="test_embedded2">
<meta attribute="eclassName" inherit="false">Embedded2</meta>
<meta attribute="epackage" inherit="false">test</meta>
<id type="long" name="e_id" column="e_id" access="org.eclipse.emf.teneo.hibernate.mapping.identifier.IdentifierPropertyHandler">
<meta attribute="syntheticId" inherit="false">true</meta>
<generator class="native"/>
</id>
<discriminator type="string">
<column name="dtype" index="test_embedded2dtype" length="255" not-null="true"/>
</discriminator>
<version name="e_version" column="e_version" access="org.eclipse.emf.teneo.hibernate.mapping.property.VersionPropertyHandler">
<meta attribute="syntheticVersion" inherit="false">true</meta>
</version>
<property name="name" lazy="false" insert="true" update="true" not-null="true" unique="false" type="java.lang.String">
<column not-null="true" unique="false" name="name"/>
</property>
</class>
<class entity-name="test.Embedded" abstract="false" lazy="true" discriminator-value="test.Embedded" table="test_embedded">
<meta attribute="eclassName" inherit="false">Embedded</meta>
<meta attribute="epackage" inherit="false">test</meta>
<id type="long" name="e_id" column="e_id" access="org.eclipse.emf.teneo.hibernate.mapping.identifier.IdentifierPropertyHandler">
<meta attribute="syntheticId" inherit="false">true</meta>
<generator class="native"/>
</id>
<discriminator type="string">
<column name="dtype" index="test_embeddeddtype" length="255" not-null="true"/>
</discriminator>
<version name="e_version" column="e_version" access="org.eclipse.emf.teneo.hibernate.mapping.property.VersionPropertyHandler">
<meta attribute="syntheticVersion" inherit="false">true</meta>
</version>
<property name="name" lazy="false" insert="true" update="true" not-null="true" unique="false" type="java.lang.String">
<column not-null="true" unique="false" name="name"/>
</property>
<many-to-one name="value" entity-name="test.Embedded2" lazy="proxy" cascade="all" foreign-key="test_embedded_value" insert="true" update="true" not-null="true" unique="true">
<column not-null="true" unique="false" name="embedded2_value_e_id"/>
</many-to-one>
</class>
<class entity-name="test.Table" abstract="false" lazy="true" discriminator-value="test.Table" table="test_table">
<meta attribute="eclassName" inherit="false">Table</meta>
<meta attribute="epackage" inherit="false">test</meta>
<id type="long" name="e_id" column="e_id" access="org.eclipse.emf.teneo.hibernate.mapping.identifier.IdentifierPropertyHandler">
<meta attribute="syntheticId" inherit="false">true</meta>
<generator class="native"/>
</id>
<discriminator type="string">
<column name="dtype" index="test_tabledtype" length="255" not-null="true"/>
</discriminator>
<version name="e_version" column="e_version" access="org.eclipse.emf.teneo.hibernate.mapping.property.VersionPropertyHandler">
<meta attribute="syntheticVersion" inherit="false">true</meta>
</version>
<property name="name" lazy="false" insert="true" update="true" not-null="true" unique="false" type="java.lang.String">
<column not-null="true" unique="false" name="name"/>
</property>
<list name="content" lazy="true" cascade="all,delete-orphan">
<key foreign-key="test_table_content_key" update="true">
<column name="table_content_e_id" unique="false"/>
</key>
<list-index column="table_content_idx"/>
<one-to-many entity-name="test.Embedded"/>
</list>
</class>
Any hints, please?
[Updated on: Tue, 21 July 2015 15:58] Report message to a moderator |
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| Re: [Teneo] possible bug: object references an unsaved transient instance [message #1702553 is a reply to message #1702380] |
Thu, 23 July 2015 07:59  |
Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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Hi Oleg,
Can you enter a bugzilla for it? It would be great if you can attach a small example model so there is no confusion on
this. If you can add some pseudo code which shows what you do to reproduce the issue then I can move that into a test case.
And also which teneo/hibernate version you are running/testing.
gr. Martin
On 22-07-15 00:30, Oleg Orlov wrote:
> I made some investigations in the debugger to see, whats going on here.
>
> 1. Table object has its e_id, Embedded and Embedded2 are in transient state.
> 2. Merge Table object.
> 3. Hibernate cascade merge to Embedded and then to Embedded2.
> 4. Hibarnate trying propagate cascade merge back to Embedded and failed with exception.
>
> Step 4 here is the root of the problem. Embedded2 references to Embedded with special, teneo specific, association
> EContainerUserType. Then hibernate ask this association about its direction (getForeignKeyDirection) it answers
> ForeignKeyDirection.FOREIGN_KEY_FROM_PARENT (this is not true in that case) and hibernate decide to propagate merge back
> to Embedded object.
>
> If we intercept this process in the debugger and force to return from getForeignKeyDirection anything but
> FOREIGN_KEY_FROM_PARENT , merge process ends with success.
--
With Regards, Martin Taal
Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Cell: +31 (0)6 288 48 943
Tel: +31 (0)84 420 2397
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Mail: mtaal@xxxxxxxx - mtaal@xxxxxxxx
Web: www.springsite.com - www.elver.org
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