Hi Bob, Your function is selecting a child element, but it might not exist. Add a question mark behind the return type, that should do the trick. element()? means that the function returns either one element or none. Or in other words a sequence of elements with a size of either one or zero.
Kind regards, Geert > Drs. G.P.H. Josten Consultant http://www.daidalos.nl/ Daidalos BV Source of Innovation Hoekeindsehof 1-4 2665 JZ Bleiswijk Tel.: +31 (0) 10 850 1200 Fax: +31 (0) 10 850 1199 http://www.daidalos.nl/ KvK 27164984 De informatie - verzonden in of met dit emailbericht - is afkomstig van Daidalos BV en is uitsluitend bestemd voor de geadresseerde. Indien u dit bericht onbedoeld hebt ontvangen, verzoeken wij u het te verwijderen. Aan dit bericht kunnen geen rechten worden ontleend. > From: [email protected] > [mailto:[email protected]] On Behalf Of > Runstein, Robert E. (Contr) (IS) > Sent: donderdag 23 april 2009 21:24 > To: [email protected] > Subject: [MarkLogic Dev General] Coercion error passing > element to function > > Hi, > > I am trying to create units tests for my functions and have > encountered an error when I attempt to pass an element to the > function. > > I've omitted the namespace declarations from the example for brevity. > > The function defintion is: > > declare function mine:doSomething($item as element()) as element() { > return $item/ns:someElement > }; > > This works fine when invoked with $item obtained from a > string version of a SOAP document passed in declared as follows: > > declare variable $source external; > let $item := > xdmp:unquote($source)/SOAP-ENV:Envelope/SOAP-ENV:Body/ns:item > let $result := mine:doSomething($item) > return $result > > The problem is when I attempt to call the function from a > unit test where I construct a shorter document like > > let $item := xdmp:unquote("<ns:item > xmlns:ns="http://urn:my:namespace";><ns:subItem>text</ns:subIte > m></ns:item>") /ns:item > > let $result := mine:doSomething($item) > return $result > > I get the following error > > [1.0-ml] XDMP-AS: (err:XPTY0004) > mine:doSomething(<ns:item><ns:subItem>text</ns:subItem></ns:it > em>) -- invalid coercion: () as element() > > I've tried using an element constructor to create an element > to pass to the function but I still get the same invalid > coercion: () as element() error. > > Any ideas how I can get the abbreviated form to work? > > Thanks, > > Bob > > _______________________________________________ General mailing list [email protected] http://xqzone.com/mailman/listinfo/general
