[rules-users] list operations in "then" part

[Simon Chen]

Hi all,

I am always confused about what we can do in the "then" part of the rule.

In particular, I have problem duplicate a list. For example:

when:
  $b: Book( "james" memberOf authors )
then:
  Test fact = new Test();
  fact.getList().addAll( $b.authors );
  insert(fact);
end

The error message reads like this:

BuildError: Unable to build expression for 'consequence': [Error:
Failed to compile: 2 compilation error(s):
 - (1,7) unqualified type in strict mode for: $b
 - (1,12) unqualified type in strict mode for: authors]

What is the right way to do this?

Thanks.
-Simon