Re: [rules-users] Ask for help on rule authoring

Hi Wolfgang, I managed to author this rule(ApplicationData( age == null || age == "" )) via Technical Rules editor of BRMS. However, I cannot create this rule via Business Rule Guided Editor of BRMS. Could you let me know how? Thanks 2011/3/26 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt;: > You can't use a method call as the left hand side operand in a constraint; > thus > age.size() == 0 > is not correct. > > Do you really mean > age == "null" > > Probably > ApplicationData( age == null || age == "" ) > is the right thing to do, provided that ApplicationData.age is a String. > > -W > > On 25 March 2011 17:32, Benson Fung <benson.redhat(a)gmail.com&gt; wrote: >> >> Hi, >> >> I got the following rule problem. >> >> The rule is like : >> >> 1. | rule "Rule1" >> 2. | dialect "mvel" >> 3. | when >> 4. | ad : ApplicationData( age == "null" , age.size() >> == 0) >> 5. | then >> 6. | ad.setReturnMsg( "age should not be null or empty" >> ); >> 7. | end >> >> where setReturnMsg is a method of ApplicationData Fact(); >> >> However, I got the validation error : >> >> [Rule1] [ERR 101] Line 4:49 no viable alternative at input ')' in rule >> "Rule1" in pattern ApplicationData >> [Rule1] [ERR 102] Line 4:51 mismatched input '==' expecting ')' in >> rule "Rule1" in pattern ApplicationData >> >> Please help what the problem is. >> >> >> Thanks >> _______________________________________________ >> 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 > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users