Multiple Actions in a single rule

[Aditya Mishra]

Hi,

I'd like to know if there's a way to add multiple actions inside a single rule based on conditions or so, similar to an if-else-if statement or a switch case (I know Drools rules return boolean values but I am looking for non boolean return types for my use case as I have multiple rules and if-else structure suits it well)

Something like this :
Rule 1
   if condition A
   action A
   if condition B

   action B
....
I also wish to know if there's a way to call another rule from one rule. Any sample rule helps.

[Richard Bourner]

What you are trying to achieve should actually be 2 separate rules, 1 for A and 1 for B.

You cannot call a rule from another rule, that defeats the purpose of an inference engine. But what you can do is set some flag in the action part of rule 1 that will make conditions of rule 2 to satisfy and therefore forces the 2nd one to fire after the 1st. That flag could be a new object to be inserted, or an attribute of an existing object.

[Jared Davis]

The 8.44 doc is missing a section in error related to this topic. I was assured this was a supported operation.

Please look here: https://docs.drools.org/7.74.1.Final/drools-docs/html_single/#drl-rules-THEN-advanced-con_drl-rules

On Monday, April 8, 2024 at 1:42:51 AM UTC-4 Aditya Mishra wrote:

[Daniel Clark]

You could also look at named consequences, although it is often simpler just to use two distinct rules.
https://blog.kie.org/2012/09/conditional-named-consequences-in-drools-5-5.html

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