openHAB3 rule with QuantityType items

Setup, Configuration and Use Scripts & Rules
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1

Hello,

I am using oh3 RC1-2 and have startet to work with quantityTypes instead of unitless Numbers.

I have two Items defined as Number:Volume and the following rule to calculate my daily water consumption:

var test = Wasserzaehler_ZaehlerstandLiter.deltaSince(now.withHour(0).withMinute(0).withSecond(0))
postUpdate(Wasserzaehler_Verbrauchtaeglich, test)

But I get the following error:

2020-12-15 18:06:35.591 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID ‘wasserverbrauch_taeglich’ failed: class org.openhab.core.library.types.QuantityType cannot be cast to class org.openhab.core.library.types.DecimalType (org.openhab.core.library.types.QuantityType and org.openhab.core.library.types.DecimalType are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @10739cb2)

I think it is a problem of the quanitiyTypes but I have no idea how to handle this.I tried different ways to define the variable but without success.

Can someone point my in the right direction?

Thank you!

2

Which persistence service do you use? Default: RRD4J? The description of your issue sounds like a minor bug in PersistenceExtension.deltaSince() method. There seems to be a wrong type conversion when the persistence returns a QuantityType value. I will have a look.

Can you amend your configuration of the two Items - if possible? Or did you create them via UI?

3

I have created them via UI. I use RRD4J.

If you need more Information feel free…

Thank you for your help!

4

Thanks for your report. I think I already figured the root cause and prepared a fix for it.

5

Awesome, so I have to switch to the snapshot builds… can you inform me when it is solved and in a new version.
Other question: I assume that my rule should work for normal case?

Thank You for the quick reply and help!

6

Fix is merged: https://github.com/openhab/openhab-core/pull/1939
Will be in snapshots starting from tomorrow.

7

Thank you guys!!! Works like a charm!!!

8

I assume you already answered this question on your own. I am glad it is working now. Thanks for the feedback and testing.

9

I thank you for all your work!!!
I had to add a Number.

var Number test