I have a rule, which usually fires, when a item was triggered, but I also like to cron that rule. As the rule already triggers, when the underlying item could be in the old state, so I’d like to do something like this:
if (typeof(event) === undefined) {
// Take the item, if rule was cron-triggered
var sonnenphase = items["AstronomischeSonnendatenPL12_Sonnenphase"];
} else {
// take the itemCommand, if the rule was item-triggered
var sonnenphase = event.itemCommand;
}
But the logs give me this:
2021-01-21 09:18:22.637 [ERROR] [internal.handler.ScriptActionHandler] - Script execution of rule with UID 'AstroDarkness' failed: ReferenceError: "event" is not defined in <eval> at line number 6
which is precisely, what I’d like to have!
what should I do event == undefined also doesn’t work…
But beware, it might not work for an unexpected reason. Everything in this gets reused every time the script is run. This is great as it gives us a way to preserve stuff between runs of the rule. But it means that once the rule is triggered by an Item once, this.event might always be defined from that point onwards. So the test would only work that first time.
I’ve never done this so I don’t know the behavior.
One thing that might work to get around this is to make the last line of the rule reset this.event to null or undefined.
But the big trick here is that JavaScript appears to let you test if a variable is defined on some Object (in this case this), but it doesn’t let you do the same on variables in general (i.e. event without the this.). Since this.event and event are essentially the same thing we can get around the limitation.
