[rules-users] [5.4.0] Combining custom operators with OR results in compile error

[Stathis Rouvas]

Hello List,

I recently migrated from Drools.5.0.1 to Drools.5.4.0 and I am having issues when combining constraints with OR when custom operators are involved.

For example, the following rule:

rule "r548695.1" 
  no-loop  true
  dialect "mvel"
when
  gnId : GN()
  la : t547147(   ) 
  v1717 : Tra48( gnId.gNo==gNo , name F_str[startsWith] la.c547148 || postCode F_str[contains] la.c547149 ) 
then
  System.out.println("Rule r548695.1 fired");
end

results in the following exception:

Unable to Analyse Expression gnId.gNo == gNo && ( F_str0.evaluate( name, la.c547148 ) || F_str1.evaluate( postCode, la.c547149 ) ):
[Error: unable to resolve method using strict-mode: my.package.rulez.Tra48.F_str0()]
[Near : {... gNo == gNo && ( F_str0.evaluate( name, la.c54 ....}]
                             ^ : [Rule name='r548695.1']

Please note, that the same rule using AND (&&) between the custom operators compiles OK.

The above rule had not problem whatsoever in Drools.5.0.1.

Any ideas to overcome this issue, are most welcomed.

-Stathis