[rules-users] OR operator

[Mark Proctor]

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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