XML Export Entity of relation 1 to * (many) gives error

0
Hi all,   I have the following 3 entities in my model, with the following associations  Model 1 – 1 Part 1← * Property   When I export to XML using a mapping with Model and Part only (see mapping bellow) , the export to XML function works fine     When I however export to XML using all entities (Model, Part, Property) with a mapping including all 3 entities (see bellow), I get the following error when I click on XML export: “An error occurred, please contact your Administrator”   The logic of the microflow to export and download the xml file is based on this Mendix how to : https://docs.mendix.com/howto/integration/export-xml-documents  Retrieve List of Models from database → Create XML document (with the previously extracted list as a member , plus the filename) → Export to XML using the appropriate mapping → download file.   Does the 1 to many association of the Property entity play a role when exporting to XML ?   I can export xml files when I choose to export only the Model and the Part, but I get an error when I choose to export all 3 Entities.  Any idea where to look at to resolve this issue?   Thanks a lot Emma   Using Mendix 9.4.0  
asked
1 answers
0

Hi, I am posting the strac trace of the error here:
 

com.mendix.modules.microflowengine.MicroflowException: Exporting an empty object is not allowed when element is neither optional nor nillable (Model|Part|Property attribute: MyFirstModule.Property.Content)
    at MyFirstModule.Model_Export (Export with mapping : 'Export to XML')

Advanced stacktrace:
    at com.mendix.modules.microflowengine.MicroflowUtil.processException(MicroflowUtil.java:85)

Caused by: com.mendix.systemwideinterfaces.MendixRuntimeException: Exporting an empty object is not allowed when element is neither optional nor nillable (Model|Part|Property attribute: MyFirstModule.Property.Content)
    at com.mendix.integration.exporter.Exporter.throwNullNotAllowed(Exporter.scala:202)
    at com.mendix.integration.exporter.Exporter.exportNull(Exporter.scala:190)
    at com.mendix.integration.exporter.Exporter.exportValue(Exporter.scala:162)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2(Exporter.scala:148)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2$adapted(Exporter.scala:146)
    at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:563)
    at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:561)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:919)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1(Exporter.scala:146)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1$adapted(Exporter.scala:143)
    at scala.Option.foreach(Option.scala:437)
    at com.mendix.integration.exporter.Exporter.exportObject(Exporter.scala:143)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$2(Exporter.scala:128)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$2$adapted(Exporter.scala:127)
    at scala.collection.immutable.List.foreach(List.scala:333)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$1(Exporter.scala:127)
    at com.mendix.integration.exporter.Exporter.withContainer(Exporter.scala:111)
    at com.mendix.integration.exporter.Exporter.exportListOfObjects(Exporter.scala:125)
    at com.mendix.integration.exporter.Exporter.handleObjectMapping(Exporter.scala:95)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2(Exporter.scala:152)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2$adapted(Exporter.scala:146)
    at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:563)
    at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:561)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:919)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1(Exporter.scala:146)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1$adapted(Exporter.scala:143)
    at scala.Option.foreach(Option.scala:437)
    at com.mendix.integration.exporter.Exporter.exportObject(Exporter.scala:143)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$2(Exporter.scala:128)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$2$adapted(Exporter.scala:127)
    at scala.collection.immutable.List.foreach(List.scala:333)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportListOfObjects$1(Exporter.scala:127)
    at com.mendix.integration.exporter.Exporter.withContainer(Exporter.scala:111)
    at com.mendix.integration.exporter.Exporter.exportListOfObjects(Exporter.scala:125)
    at com.mendix.integration.exporter.Exporter.handleObjectMapping(Exporter.scala:95)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2(Exporter.scala:152)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$2$adapted(Exporter.scala:146)
    at scala.collection.IterableOnceOps.foreach(IterableOnce.scala:563)
    at scala.collection.IterableOnceOps.foreach$(IterableOnce.scala:561)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:919)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1(Exporter.scala:146)
    at com.mendix.integration.exporter.Exporter.$anonfun$exportObject$1$adapted(Exporter.scala:143)
    at scala.Option.foreach(Option.scala:437)
    at com.mendix.integration.exporter.Exporter.exportObject(Exporter.scala:143)
    at com.mendix.integration.exporter.Exporter.handleObjectMapping(Exporter.scala:87)
    at com.mendix.integration.exporter.Exporter.export(Exporter.scala:55)
    at com.mendix.integration.exporter.Exporter.export$(Exporter.scala:54)
    at com.mendix.integration.exporter.xml.XmlExporter.export(XmlExporter.scala:16)
    at com.mendix.integration.exporter.Exporter.exportToStream(Exporter.scala:65)
    at com.mendix.integration.exporter.Exporter.exportToStream$(Exporter.scala:64)
    at com.mendix.integration.exporter.xml.XmlExporter.exportToStream(XmlExporter.scala:16)
    at com.mendix.integration.internal.InternalIntegration.$anonfun$doExportToStream$2(InternalIntegration.scala:113)
    at scala.util.Using$.resource(Using.scala:261)
    at com.mendix.integration.internal.InternalIntegration.doExportToStream(InternalIntegration.scala:112)
    at com.mendix.integration.internal.InternalIntegration.doExportToStream$(InternalIntegration.scala:99)
    at com.mendix.integration.internal.InternalIntegrationImpl.doExportToStream(InternalIntegrationImpl.scala:32)
    at com.mendix.integration.actions.microflow.ExportAction.com$mendix$integration$actions$microflow$ExportAction$$exportToStream(ExportAction.scala:52)
    at com.mendix.integration.actions.microflow.ExportAction$$anonfun$1.applyOrElse(ExportAction.scala:58)
    at com.mendix.integration.actions.microflow.ExportAction$$anonfun$1.applyOrElse(ExportAction.scala:56)
    at scala.PartialFunction$Lifted.apply(PartialFunction.scala:313)
    at scala.PartialFunction$Lifted.apply(PartialFunction.scala:309)
    at scala.Option.collect(Option.scala:462)
    at com.mendix.integration.actions.microflow.ExportAction.exportToFile(ExportAction.scala:56)
    at com.mendix.integration.actions.microflow.ExportAction.execute(ExportAction.scala:43)
    at com.mendix.integration.actions.microflow.ExportAction.execute(ExportAction.scala:22)
    at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$anonfun$execute$1(MicroflowObject.scala:31)
    at scala.Option.flatMap(Option.scala:283)
    at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.scala:28)
    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.$anonfun$executeAfterBreakingIfNecessary$2(MicroflowImpl.scala:167)
    at scala.Option.flatMap(Option.scala:283)
    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:167)
    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:114)
    at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:46)
    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)
    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)
    at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.scala:25)
    at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:80)
    at com.mendix.util.classloading.Runner.withContextClassLoader(Runner.java:19)
    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:79)
    at com.mendix.basis.actionmanagement.MicroflowCallBuilderImpl.execute(MicroflowCallBuilderImpl.scala:38)
    at com.mendix.webui.actions.client.ExecuteMicroflowAction.runMicroflow(ExecuteMicroflowAction.scala:76)
    at com.mendix.webui.actions.client.ExecuteMicroflowAction.$anonfun$apply$3(ExecuteMicroflowAction.scala:42)
    at com.mendix.webui.actions.client.RegularClientAction$Helpers$.$anonfun$liftEither$1(RegularClientAction.scala:29)
    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.$anonfun$apply$4(RegularClientAction.scala:55)
    at com.mendix.webui.requesthandling.helpers.StateHandling.withState(StateHandling.scala:39)
    at com.mendix.webui.requesthandling.helpers.StateHandling.withState$(StateHandling.scala:36)
    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.withState(RegularClientAction.scala:45)
    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:53)
    at com.mendix.webui.actions.client.RegularClientAction$Helpers$StateHandler.apply(RegularClientAction.scala:45)
    at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:43)
    at com.mendix.webui.actions.client.ExecuteMicroflowAction.apply(ExecuteMicroflowAction.scala:22)
    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$3(RegularClientAction.scala:109)
    at scala.util.Try$.apply(Try.scala:210)
    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2(RegularClientAction.scala:109)
    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$2$adapted(RegularClientAction.scala:107)
    at com.mendix.webui.requesthandling.helpers.ContextHandling.$anonfun$inContext$5(ContextHandling.scala:51)
    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
    at com.mendix.basis.actionmanagement.ActionMonitoring$.$anonfun$monitor$1(ActionMonitoring.scala:49)
    at com.mendix.util.classloading.Runner.withContextClassLoader(Runner.java:19)
    at com.mendix.basis.actionmanagement.ActionMonitoring$.monitor(ActionMonitoring.scala:49)
    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:51)
    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:26)
    at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:86)
    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext(ContextHandling.scala:23)
    at com.mendix.webui.requesthandling.helpers.ContextHandling.inContext$(ContextHandling.scala:18)
    at com.mendix.webui.actions.client.RegularClientAction.inContext(RegularClientAction.scala:86)
    at com.mendix.webui.actions.client.RegularClientAction.$anonfun$execute$1(RegularClientAction.scala:107)
    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
    at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest(ProfileHandling.scala:14)
    at com.mendix.webui.requesthandling.helpers.ProfileHandling.profileRequest$(ProfileHandling.scala:10)
    at com.mendix.webui.actions.client.RegularClientAction.profileRequest(RegularClientAction.scala:86)
    at com.mendix.webui.actions.client.RegularClientAction.execute(RegularClientAction.scala:104)
    at com.mendix.webui.requesthandling.ClientRequestHandler.handleAction(ClientRequestHandler.scala:106)
    at com.mendix.webui.requesthandling.ClientRequestHandler.processRequest(ClientRequestHandler.scala:79)
    at com.mendix.externalinterface.connector.RequestHandler.doProcessRequest(RequestHandler.java:35)
    at com.mendix.external.connector.MxRuntimeConnector.lambda$processRequest$0(MxRuntimeConnector.java:74)
    at com.mendix.util.classloading.Runner.withContextClassLoader(Runner.java:19)
    at com.mendix.external.connector.MxRuntimeConnector.processRequest(MxRuntimeConnector.java:73)
    at com.mendix.basis.impl.MxRuntimeImplBase.processRequest(MxRuntimeImplBase.java:825)
    at com.mendix.m2ee.appcontainer.server.handler.RuntimeServlet.service(RuntimeServlet.scala:25)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
    at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
    at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:228)
    at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
    at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
    at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
    at org.eclipse.jetty.server.Server.handle(Server.java:516)
    at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
    at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
    at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:386)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
    at java.base/java.lang.Thread.run(Thread.java:834)
 

answered