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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-11165" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-cfa3aa27-6c2d-4e28-8558-59736e2606f1" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11165" style="color: #3b73af; text-decoration: none">HHH-11165</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-11165" style="color: #3b73af; text-decoration: none">HBM mapping: Customize unique key name for many-to-one with orphan-delete cascading fails</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-cfa3aa27-6c2d-4e28-8558-59736e2606f1" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.0.11, 5.1.2, 5.2.3 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 10/Oct/2016 04:07 AM </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-130edfb8-706f-4b44-93f6-8ad16652c9de" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="hbrands" id="email_hbrands" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=hbrands" style="color:#6c797f;; color: #3b73af; text-decoration: none">Holger Brands</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">Some background about this issue can be found in the Hibernate forum here:<br> <a href="https://forum.hibernate.org/viewtopic.php?f=1&t=1043689&sid=333833f9c9690a36a4b468f5c32390c6" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://forum.hibernate.org/viewtopic.php?f=1&t=1043689&sid=333833f9c9690a36a4b468f5c32390c6</a></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The issue is that it's not possible with recent Hibernate 5.x versions to customize the unique key name on a many-to-one association with the unique-key attribute that has also a orphan delete cascading. (The upcoming attachment has a complete test case)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The following mapping ...</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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<pre class="code-xml" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-tag" style="color: #000091"><many-to-one cascade=<span class="code-quote" style="color: #009100">"all-delete-orphan"</span> entity-name=<span class="code-quote" style="color: #009100">"TestWorkflowItem"</span> column=<span class="code-quote" style="color: #009100">"next_id"</span> unique-key=<span class="code-quote" style="color: #009100">"uk_nextid"</span> name=<span class="code-quote" style="color: #009100">"next"</span> foreign-key=<span class="code-quote" style="color: #009100">"fk_testworkflowitem_workflowitem"</span>/></span>
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">...causes a mapping Exception:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
org.hibernate.testing.junit4.CallbackException: org.hibernate.testing.junit4.BaseCoreFunctionalTestCase#buildSessionFactory
at org.hibernate.testing.junit4.TestClassMetadata.performCallbackInvocation(TestClassMetadata.java:203)
at org.hibernate.testing.junit4.TestClassMetadata.invokeCallback(TestClassMetadata.java:187)
at org.hibernate.testing.junit4.TestClassMetadata.performCallbacks(TestClassMetadata.java:181)
at org.hibernate.testing.junit4.TestClassMetadata.performBeforeClassCallbacks(TestClassMetadata.java:172)
at org.hibernate.testing.junit4.BeforeClassCallbackHandler.evaluate(BeforeClassCallbackHandler.java:25)
at org.hibernate.testing.junit4.AfterClassCallbackHandler.evaluate(AfterClassCallbackHandler.java:25)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: org.hibernate.boot.MappingException: many-to-one attribute [TestWorkflowItem.next] specified delete-orphan but is not specified as unique; remove delete-orphan cascading or specify unique=<span class="code-quote" style="color: #009100">"<span class="code-keyword" style="color: #000091; color: #009100">true</span>"</span> : origin(org/hibernate/test/TestWorkflowItem
.hbm.xml)
at org.hibernate.boot.model.source.internal.hbm.ModelBinder.createManyToOneAttribute(ModelBinder.java:2174)
at org.hibernate.boot.model.source.internal.hbm.ModelBinder.bindAllEntityAttributes(ModelBinder.java:1215)
at org.hibernate.boot.model.source.internal.hbm.ModelBinder.bindRootEntity(ModelBinder.java:264)
at org.hibernate.boot.model.source.internal.hbm.ModelBinder.bindEntityHierarchy(ModelBinder.java:184)
at org.hibernate.boot.model.source.internal.hbm.HbmMetadataSourceProcessorImpl.processEntityHierarchies(HbmMetadataSourceProcessorImpl.java:144)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.processEntityHierarchies(MetadataBuildingProcess.java:218)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:265)
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418)
at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:87)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:692)
at org.hibernate.testing.junit4.BaseCoreFunctionalTestCase.buildSessionFactory(BaseCoreFunctionalTestCase.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.hibernate.testing.junit4.TestClassMetadata.performCallbackInvocation(TestClassMetadata.java:200)
... 18 more
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">If the many-to-one mapping is changed to also include unique="true", the mapping exception goes away, but the specified unique key name "uk_nextid" is ignored and not used. Instead an auto-generated key name is used:</p>
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<pre class="code-sql" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
alter table test_workflowitem add constraint UK_kewmkhh9wckso1vdmvph1l98p unique (next_id)
</pre>
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