Steps to reproduce (on ODF demo)

• Create an extraction with the following query:
  • Type: empty
  • Content type: Program
  • Columns: childProgramParts.workflowStep
• Run it
  • The result file is empty and you get the following error into the logs:

    2022-12-20 12:09:23,481 ERROR [org.ametys.core.schedule.AmetysJob$org.ametys.plugins.extraction.execution.ExecuteExtractionSchedulable] (AmetysRuntimeScheduler_Worker-2;) An exception occured during the execution of the Schedulable 'org.ametys.plugins.extraction.execution.ExecuteExtractionSchedulable'
    java.lang.IllegalArgumentException: Item 'childProgramParts/workflowStep' not found in models: 'Optional[org.ametys.plugins.odf.Content.program]'.
    	at org.ametys.runtime.model.ViewHelper.createViewItemAccessor(ViewHelper.java:125)
    	at org.ametys.runtime.model.View.of(View.java:113)
    	at org.ametys.cms.search.cocoon.ContentResultSetHelper._buildViewFromResultFields(ContentResultSetHelper.java:121)
    	at org.ametys.cms.search.cocoon.ContentResultSetHelper.saxResultFields(ContentResultSetHelper.java:97)
    	at org.ametys.plugins.extraction.component.QueryExtractionComponent.saxContents(QueryExtractionComponent.java:263)
    	at org.ametys.plugins.extraction.component.AbstractGroupExtractionComponent.saxGroup(AbstractGroupExtractionComponent.java:128)
    	at org.ametys.plugins.extraction.component.QueryExtractionComponent.processContents(QueryExtractionComponent.java:224)
    	at org.ametys.plugins.extraction.component.AbstractSolrExtractionComponent.executeComponent(AbstractSolrExtractionComponent.java:347)
    	at org.ametys.plugins.extraction.component.AbstractExtractionComponent.execute(AbstractExtractionComponent.java:102)
    	at org.ametys.plugins.extraction.execution.ExtractionExecutor._noVarExecute(ExtractionExecutor.java:342)
    	at org.ametys.plugins.extraction.execution.ExtractionExecutor._doExecuteForPathWithNoVar(ExtractionExecutor.java:329)
    	at org.ametys.plugins.extraction.execution.ExtractionExecutor._doExecute(ExtractionExecutor.java:307)
    	at org.ametys.plugins.extraction.execution.ExtractionExecutor._execute(ExtractionExecutor.java:148)
    	at org.ametys.plugins.extraction.execution.ExtractionExecutor.execute(ExtractionExecutor.java:106)
    	at org.ametys.plugins.extraction.execution.ExecuteExtractionSchedulable._doExecute(ExecuteExtractionSchedulable.java:97)
    	at org.ametys.cms.schedule.AbstractSendingMailSchedulable.execute(AbstractSendingMailSchedulable.java:81)
    	at org.ametys.core.schedule.AmetysJob.execute(AmetysJob.java:151)
    	at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
    	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)