Why is the entity not saved?
Hi,
I have an entity that was fetched from the database for display in a rich:dataTable. It is linked to another entity of the same type.
If I change stuff in the current entity and its linked sibling, the changes to the current entity are saved to the database, but those to the linked entity are not. Why? I thought the linked entity must be managed by the entity manager, too? What do I have to do also update the linked entity?
Sample Code:
@Entity
public class TextModule implements java.io.Serializable
{
[...]
private Integer releaseState;
private TextModule previousVersion;
[...incl. getters and setters, of course...]
}
@Name("textModuleHome")
@Scope(ScopeType.PAGE)
public class TextModuleHome extends EntityHome<TextModule>
{
[...]
public String release(TextModule textModule)
{
textModule.setReleaseState(ReleaseStateSet.RELEASED);
if (textModule.getPreviousVersion() != null)
{
supersede(textModule.getPreviousVersion());
}
return this.update();
}
public String supersede(TextModule textModule)
{
textModule.setReleaseState(ReleaseStateSet.SUPERSEDED);
return "superseded";
}
[...]
}release(textModule) is called from a line of rich:dataTable with the TextModule that is displayed in the current line, using an a4j:commandButton (namespace is a: here, not a4j):
<rich:panel id="listOrText">
[...]
<rich:dataTable id="textModuleList" var="_textModule" value="#{textModuleList.resultList}"
rendered="#{not empty textModuleList.resultList}">
[...]
<rich:column styleClass="action">
<f:facet name="header">Change State</f:facet>
<a:commandButton action="#{textModuleHome.release(_textModule)}" value="Release"
rendered="#{_textModule.releaseState == 1}" reRender="listOrText" />
[...]
</rich:column>
[...]
</rich:dataTable>
</rich:panel>When I click the Release button, textModule gets changed and saved to the database as it should, but textModule.previousVersion is not saved to the database.
I thought the linked entities the entity manager fetches will automatically be managed, too? Why aren't those changes saved? What can I do to ensure they are saved?
Thanks,
Christian
