Re: [rules-users] can't refer to the bound column fields from the LHS?..
Vlad,
Not yet. We may eventually support that in the future through MVEL
integration, but right now you can't do it. You can though use a return
value predicate for that though:
Rule xxx
When
$r1: MyRecord (field1 == “xxx”)
$r2: MyRecord2 (field1 == ( $r1.getField1() ))
Then
System.out.println(“found match: “+$r2+”, “+$r1);
End
I know it was just an illustration example, but always good to
reinforce: for the above case, the best would be to bind the attribute
itself, not the fact:
Rule xxx
When
$r1: MyRecord ( $f1 : field1 == “xxx”)
$r2: MyRecord2 ( field1 == $f1 )
Then
System.out.println(“found match: “+$r2+”, “+$r1);
End
[]s
Edson
Olenin, Vladimir (MOH) wrote:
Hi,
I always assumed that one can refer to the properties of the bound
column in the LHS like this:
MyRecord {
String field1, field2;
}
MyRecord2 {
String field1, field3;
}
Rule xxx
When
$r1: MyRecord (field1 == “xxx”)
$r2: MyRecord2 (field1 == $r1.field1)
Then
System.out.println(“found match: “+$r2+”, “+$r1);
End
Compiler does complain on ‘$r1’ usage in the LHS (as part of
constraint for MyRecord2 fact), but works OK if used only in RHS. The
error I’m getting is: “Unable to find class $r1”. “$r1.getField1()”
doesn’t work either (getting “mismatched token, expecting ‘)’ “ error).
Thanks,
Vlad
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Edson Tirelli
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