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https://issues.apache.org/jira/browse/CAY-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15877221#comment-15877221
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Matt Watson commented on CAY-2122:
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I just went ahead and created a new issue CAY-2242
> Vertical Inheritance: Cannot Insert Record For Implementing Class with
> Attribute And Relationship
> -------------------------------------------------------------------------------------------------
>
> Key: CAY-2122
> URL: https://issues.apache.org/jira/browse/CAY-2122
> Project: Cayenne
> Issue Type: Bug
> Components: Core Library
> Affects Versions: 4.0.M3
> Reporter: Matt Watson
> Assignee: Andrus Adamchik
> Labels: inheritance, null, relationship, vertical
> Fix For: 4.0.M4
>
> Attachments: CAY-2122-test.patch, CAY-2122-test-with-fix.patch
>
>
> When using the following DbEntities:
> IV_OTHER (id, name)
> IV_BASE (id, type, name)
> IV_IMPL (id, attr1, other_id) (vertically inherits IV_BASE)
> all fields are non-null
> We end up with ObjEntities:
> IvOther
> IvBase (abstract)
> IvImpl extends IvBase
> When running the following code:
> {code:java}
> IvOther other = context.newObject(IvOther.class);
> other.setName("other");
> IvImpl impl = context.newObject(IvImpl.class);
> impl.setName("Impl 1");
> impl.setAttr1("attr1");
> impl.setOther(other);
> context.commitChanges();
> {code}
> Committing this errors in the database, because its trying to insert into the
> IV_IMPL table with a NULL value for OTHER_ID
> {code}
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - INSERT INTO
> IV_OTHER (ID, NAME) VALUES (?, ?)
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - [bind: 1->ID:200,
> 2->NAME:'other']
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - === updated 1 row.
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - INSERT INTO
> IV_BASE (ID, NAME, TYPE) VALUES (?, ?, ?)
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - [bind: 1->ID:200,
> 2->NAME:'Impl 1', 3->TYPE:'I']
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - === updated 1 row.
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - INSERT INTO
> IV_IMPL (ATTR1, ID, OTHER_ID) VALUES (?, ?, ?)
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - [bind:
> 1->ATTR1:'attr1', 2->ID:200, 3->OTHER_ID:NULL]
> [main] INFO org.apache.cayenne.log.CommonsJdbcEventLogger - *** error.
> java.sql.SQLException: Attempt to insert null into a non-nullable column:
> column: OTHER_ID table: IV_IMPL in statement [INSERT INTO IV_IMPL (ATTR1, ID,
> OTHER_ID) VALUES (?, ?, ?)]
> {code}
> If there was only an attribute in IV_IMPL, or only a relationship on IV_IMPL
> it would work fine. But the DataDomainFlushAction is using separate
> InsertBatchQuery to handle the attributes and another one to handle the
> relationships.
> I have not yet figured out how to solve, but will continue to look into it.
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