[rules-users] How to check an array field from LHS of a rule

Hi All, I'm using Drools 5.x. I have the following class: public class Machine{ ... private List rules = new ArrayList(); ... } The 'rules' list holds strings. I would like from my rule to check whether that list contains the string "rule2". I've tried doing this in the following ways, but get compilation error: rule "rule1" when /*1st attempt:*/ $m:Machine(rules contains "rule2") /*2nd attempt:*/ $m:Machine(rules.contains("rule2") ) then ... What am I doing wrong? Thanks in advance !!! -- View this message in context: http://n3.nabble.com/How-to-check-an-array-field-from-LHS-of-a-rule-tp104... Sent from the Drools - User mailing list archive at Nabble.com.