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    <p>The problem is here. Look closer. This is invalid EL syntax.</p> <pre><code>value="#{plannedActivityController.newActivity.organiser}}" </code></pre> <p>This should however have thrown a <code>PropertyNotWritableException</code> on submit something like this:</p> <pre><code>javax.el.PropertyNotWritableException: /test.xhtml @25,39 value="#{plannedActivityController.newActivity.organiser}}": Illegal Syntax for Set Operation at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:136) at javax.faces.component.UIInput.updateModel(UIInput.java:822) at javax.faces.component.UIInput.processUpdates(UIInput.java:739) at javax.faces.component.UIForm.processUpdates(UIForm.java:281) at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1244) at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1244) at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1223) at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) </code></pre> <p>This exception should have been logged to the server log. By default this will however not end up in an error page for the enduser because JSF/PrimeFaces have by default no form of feedback to enduser in case of exceptions which are thrown during ajax requests. You should however be able to see it in actual ajax response body in webbrowser's builtin HTTP traffic monitor.</p> <p>The JSF utility library <a href="http://omnifaces.org" rel="nofollow">OmniFaces</a> offers a <a href="http://showcase.omnifaces.org/exceptionhandlers/FullAjaxExceptionHandler" rel="nofollow"><code>FullAjaxExceptionHandler</code></a> for the very problem of total absence of feedback on exceptions during ajax requests. You may find it useful. When I tried to recreate your problem, I was been presented a clear error page so that I don't need to dig in server log or HTTP traffic monitor for clues.</p>
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    1. COI can see the ajax exception in the browser debugger! Thx a lot!
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    2. COYou're welcome. That thing is not exactly a debugger. It's just a HTTP traffic monitor.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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