using 'or' like that results in subrule generation, i.e. rules will fire for all matching combinatinos - this is not what people normally want. you can also do it using field constraints

person : (Person (interests contains "Golf" || contains "Soccer")

Jaikiran Pai wrote:

Hi,

This is a very newbie question. I have a Person object which contains a collection named "interests". This collection will contain the activities that the Person is interested in. If the person is interested in Golf, Soccer and Baseball, then this collection will contain these 3 strings. I am trying to write a rule which checks whether a person is interested in Soccer OR Golf and if he's interested then do further logic. I looked at the documentation for Drools syntax, and looks like this is how i have to write the rule:

rule Testing
when
person : (Person (interests contains "Golf") or Person (interests contains "Soccer") )

then
System.out.println("I am interested");
end

Is this the correct way to do this? Is there a simpler construct like:

person : Person (interests contains "Golf" or interests contains "Soccer" )

I was thinking on the lines of the "," (and) operator :

person : Person (interests contains "Golf", interests contains "Soccer" )

Thank you.

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