Exception: object references an unsaved transient instance - save the transient instance before flushing: Child
How to reproduce issue:
1. Hibernate is load the entity "Parent". The property "child" is null
2. The "Parent" is rendered on the screen and after that the "child" property is auto instantiated. So I have the following graph:
Parent.child != null
Parent.child.childId = null
Parent.child.childKey = ""
Parent.child.childName = ""
Question: How I could to force the Hibernate to ignore updating or inserting Child entity WHEN childId = null?
If childId != null I would like just create relation.
<hibernate-mapping>
<class name="com.test.Parent"
entity-name="ParentObject" table="parent"
dynamic-insert="false" dynamic-update="true" optimistic-lock="version">
<id name="rowId" type="long">
<column name="RowID" />
<generator class="
native" />
</id>
<version name="versionSequence" type="integer"
unsaved-value="null" generated="never" insert="false">
<column name="VersionSequence" />
</version>
<many-to-one name="child" entity-name="Child" fetch="select"
optimistic-lock="true" embed-xml="false" update="true" insert="false">
<column name="ChildID" />
</many-to-one>
<property name="dateCreated" type="timestamp">
<column name="DateCreated" length="0" />
</property>
<property name="dateUpdated" type="timestamp" update="false">
<column name="DateUpdated" length="0" />
</property>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.Child"
entity-name="Child" table="Child" dynamic-insert="false"
dynamic-update="true" optimistic-lock="version">
<id name="childId" type="long" >
<column name="ChildID" />
<generator class="
native" />
</id>
<version name="versionSequence" type="integer" insert="false"
generated="never" >
<column name="VersionSequence" />
</version>
<property name="childKey" type="string" >
<column name="ChildKey" length="20" />
</property>
<property name="childName" type="string" >
<column name="ChildName" length="30" />
</property>
<property name="childNumber" type="string" >
<column name="ChildNumber" />
</property>
<property name="dateCreated" type="timestamp">
<column name="DateCreated" />
</property>
<property name="dateUpdated" type="timestamp" update="false">
<column name="DateUpdated" />
</property>
</class>
</hibernate-mapping>
