Re: [rules-users] null checking

samd wrote: > > How do I evaluate null conditions in the following case for example? > > seller: ( seller.cheese != null && seller.active == true ) > cheese: ( cheese.type == "chedder" ) from seller.cheese > > In the above example seller.cheese is null but seller is used in the > second part of the rule since we can't evaluate facts for null for some > reason how do you check for a null condition. > > should be cheese: ( type == "chedder" ) from seller.cheese anyways I tried doing this ( seller: ( seller.cheese != null && seller.active == true ) cheese: ( cheese.type == "chedder" ) from seller.cheese ) or ( seller: ( seller.cheese = null && seller.active == true ) ) Which throws an error I just need the correct syntax I guess heh -- View this message in context: http://www.nabble.com/null-checking-tp20015953p20016182.html Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users