Rule DSL - lastStateChange on an item wont work

Setup, Configuration and Use Scripts & Rules
1

I’m usind OpenHAB 4.3. In a DSL rule this can be used to get an item state:

myItem.state

or the item name:

myItem.name

Considering the JavaDocs (Item (openHAB Core 5.0.0-SNAPSHOT API)) I assumed this to work:

myItem.lastStateChange

But unfortunately it doesn’t work.

What are the functions that can be used in Rule DSL? Is there any documentation?

thanks for any help

2

Notice the difference in versions. The JavaDocs are for OH 5. These are new to OH 5 and not available in 4.3. And these will be added to the docs for OH 5.

I don’t think JavaDocs for any but the latest snapshot are posted anywhere. All of the standard stuff is available at Items | openHAB and the persistence stuff is covered at Persistence | openHAB.

Note these have nothing really to do with Rules DSL. The same properties and methods are available in all the rules languages.

3

Thank you for the reply, Rich.

I found it difficult to program rules in DSL due to missing docs and tooling. Autocomplete like a modern IDE offers would be a great help.

4

The openHAB extension for VSCode dooes autocompletion. But the other rules languages are “standard” so IDE tooling is relateively straight forward using the standard tools.

I do not recommend Rules DSL for new development of rules in OH. It has a number of limitations which makes it the least good choice for rules.