Having difficulty with rule using lastUpdate

[rlkoshak (Rich Koshak)]

Continuing the discussion from Need some Openhab settings for a magnetic contact:

Need some Openhab settings for a magnetic contact

Hi

I’m trying to have these rule worked but I have that message

rule "Update time sensors"when Item Interrupteurs received updatethen Thread::sleep(250) // give persistence time to populate lastUpdate val mostRecent = Interrupteurs?.members.sortBy[lastUpdate].last as SwitchItem logInfo(“Activite”, "Most recent is " + mostRecent.name)end

I used persistence db4.o

ThanksJOse

2015-10-27 21:49:00.552 [ERROR] [o.o.c.s.ScriptExecutionThread ] - Error during the execution of rule 'Update time sensors’java.lang.NullPointerException: null at org.eclipse.xtext.xbase.lib.ListExtensions$1.compare(ListExtensions.java:84) ~[na:na] at java.util.TimSort.countRunAndMakeAscending(TimSort.java:356) ~[na:1.8.0] at java.util.TimSort.sort(TimSort.java:216) ~[na:1.8.0] at java.util.Arrays.sort(Arrays.java:1435) ~[na:1.8.0] at java.util.Collections.sort(Collections.java:230) ~[na:1.8.0] at org.eclipse.xtext.xbase.lib.ListExtensions.sortInplaceBy(ListExtensions.java:87) ~[na:na] at org.eclipse.xtext.xbase.lib.IterableExtensions.sortBy(IterableExtensions.java:786) ~[na:na] at sun.reflect.GeneratedMethodAccessor175.invoke(Unknown Source) ~[na:na] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0] at org.eclipse.xtext.xbase.interpreter.impl.XbaseInterpreter.invokeOperation(XbaseInterpreter.java:729) ~[na:na]

Moving to a new topic so it will hopefully get more attention.

The rule seems to be stripped down to the bare minimum.

What does your db4o.persist file look like?

Paste in your Group and Items definitions for Interrupteurs and all of the Items that are members of Interrupteurs.