[rules-users] is there anyway to access to lower level of an attribute in LHS

[Tim . Nguyen]

Hi group,

Currently I have to use eval to access to lower lever of an attribute. For
example:

rule "test rule"
     when
      $person: Person ()
      eval (($person.getContact() != null) &&
($person.getContact().getEmail() == null))
     then
      System.out.println ("Email address is missing")
end


Is there anyway not to use eval. I would like to do something like this:
      $person: Person ($contact: contact != null, $contact.getEmail() ==
null)

but it throws errors


Thanks,

Tim

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