Re: [rules-users] ClassCastException when comparing date type with literal

Let me rephrase my question: As date is an attribute of message, why don't you use: $msg : Message( date > "...") Constraining an attribute of Message in the Order pattern seems a weird thing to do. Zeke-3 wrote > > It seems not work. > When I try > *$msg : Message($date : date) > Order ( $date > "Mar-01-2012" )* > I meet error "Unable to create Field Extractor for '$date' of > '[ClassObjectType class=org.drools.examples.HelloWorldExample$Second]' in > rule 'default' : [Rule name=default, agendaGroup=MAIN, salience=0, > no-loop=false]" > > When I try > *$msg : Message($date : date) > eval ( $date > "Mar-01-2012" )* > If the dialect is "java", I meet error "Rule Compilation error : [Rule > name=default, agendaGroup=MAIN, salience=0, no-loop=false] > org/drools/examples/test/Rule_default_0.java (8:354) : The operator > > is undefined for the argument type(s) Date, String" > If the dialect is "mvel", I meet the same ClassCastException. > > On 29 March 2012 22:28, FrankVhh &lt;frank.vanhoenshoven@&gt; wrote: > >> This may sound a bit rude, but... why would you want to do such a thing? >> >> If there is a constraint on the message, then why not put that constraint >> in >> the message structure? >> >> Btw, I think it would work by using eval($date < "...") but see no use >> for >> it either. >> >> >> Joe Zendle wrote >> > >> > did you try: >> > >> > *$msg : Message($date : date) >> > Order ( $date > "Mar-01-2012" )* >> > >> > >> > >> > 2012/3/29 Zeke &lt;xanadu860122@&gt; >> > >> >> Hi, guys: >> >> I meet a strange issue and need your help again... I am using Drools >> >> 4.0.7. >> >> When my rule condition is as *Message( date > "Mar-01-2012" )*, >> >> everything is OK. But if I change it to be as below: >> >> *$msg : Message() >> >> Order ( $msg.date > "Mar-01-2012" )* >> >> I will meet "java.lang.String cannot be cast to java.util.Date" >> >> ClassCastException. "Order" is another fact. I attach the exception >> call >> >> stack. Please check it. It looks like a bug to me. Do we fix it in >> later >> >> release? If so, can you tell me which release contains the fix? >> Thanks! >> >> >> >> _______________________________________________ >> >> rules-users mailing list >> >> rules-users@.jboss >> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> >> > >> > _______________________________________________ >> > rules-users mailing list >> > rules-users@.jboss >> > https://lists.jboss.org/mailman/listinfo/rules-users >> > >> >> >> -- >> View this message in context: >> http://drools.46999.n3.nabble.com/rules-users-ClassCastException-when-com... >> Sent from the Drools: User forum mailing list archive at Nabble.com. >> _______________________________________________ >> rules-users mailing list >> rules-users@.jboss >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > _______________________________________________ > rules-users mailing list > rules-users@.jboss > https://lists.jboss.org/mailman/listinfo/rules-users > -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-ClassCastException-when-com... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users