制定规则时如何在drools-guvnor中比较相同事实的两个约束

Question

I have Fact - Orders and two constraints under it : Orders - > Account and Orders - > TargetAccount

I am making a rule inside free form DRL such that if Orders.Account.AccountNumber ! = Orders.TargetAccount.AccountNumber then a specific PDF should be generated.

How to write this when condition ?

Answer 1

Based on your description, it should be as simple as

when
  Orders.Account.AccountNumber ! = Orders.TargetAccount.AccountNumber
then
  // generate specific PDF

Or was the some details involved that I missed?

Answer 2

Ok - so it worked like this way : Orders (Account.AccountNumber != TargetAccount.AccountNumber) I recommend to use minimum of || or && , instead use number of free form DRLs one below each other if OR conditions are not there . Try to avoid && , it creates issues specially when we have more than 2 AND conditions