Re: [rules-users] MVEL expression

Although Drools makes extensive usage of MVEL, it is always embedded in the DRL language. So, it is Drools that defines that a field constraint is always a field accessor in the left with one or more restrictions in the right. We need to find a way to make the Drools x MVEL relationship more clear because it is not the first time this slight confusion is made. Anyway, docs are being updated, but take a look at the Pattern documentation (item 7.8.2.1): https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t... #RuleLanguage-ConditionalElements []s Edson 2009/3/17 Femke De Backere <femmyke(a)gmail.com&gt; Thx! Do you know where I could find a tutorial of MVEL in Drools, because I looked at some MVEL tutorials yesterday and I didn't find the solution... 2009/3/17 Edson Tirelli <tirelli(a)post.com&gt; Left side of a constraint should always be a field name... no expression allowed. Either move the expression to the right side or use eval. Patient( sedation.ultiva > ( 0.1 - 0.02 ) ) Or even better: Patient(sedation.ultiva > 0.08) []s Edson 2009/3/16 Femke De Backere <femmyke(a)gmail.com&gt; Hi, The following expression keeps returning the error [112,32]: [ERR 103] Line 112:32 no viable alternative at input '+' in rule "RuleFlow-Split-masterproef.ruleflows.shortsedation-18-22" in pattern Patient: Patient(sedation.ultiva+0.02 > 0.1) with sedation.ultiva returning a double What am I doing wrong? Thx, Femke _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users