Hi Spike-
I think the issue here is that '/mydocument' is never being evaluated
as xpath.
You might want to try xdmp:eval.
You may have to refactor things a little, but a pattern that applies is:
let $e-string := fn:concat("let $q := 'the' ", "return cts:search( "/
mydocument,'", "$q)")
return xdmp:eval($e-string)
You could create a method to return the query constructor code (the
"let $q := 'the' " part) as a string. This assumes /mydocument does
indeed evaluate properly. The trick is in providing all the info
needed in the eval context (variables, namespaces mostly.)
If your code becomes too complex to manage with an eval string, you
could look into xdmp:invoke, which might allow you to create something
that's more sophisticated and maintainable.
Frank
On Aug 18, 2009, at 10:34 AM, Grobstein, Spike wrote:
Thanks Geert,
I'm trying to pass the xpath as a string, so I call like this:
cleanup:find($thirty_days, '/mydocument')
and in the function, I have:
cts:search(xdmp:value($base_context), $query)
I'm still getting the error about being unsearchable.
I don't understand what you mean about using concat() to make it a
complete expression, though. I assume you meant to put the leading /
on
it?
...spike
-----Original Message-----
From: general-boun...@developer.marklogic.com
[mailto:general-boun...@developer.marklogic.com] On Behalf Of Geert
Josten
Sent: Tuesday, August 18, 2009 10:25 AM
To: General Mark Logic Developer Discussion
Subject: RE: [MarkLogic Dev General] using function parameter as
contextforcts:search
Hi Spike,
I see two options:
- replace your xpath with some query which can be passed as parameter
and added to the and-query
- pass the xpath as a string, use concat to make it a complete
expression and use xdmp:value to execute the string expression
Kind regards,
Geert
Drs. G.P.H. Josten
Consultant
http://www.daidalos.nl/
Daidalos BV
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From: general-boun...@developer.marklogic.com
[mailto:general-boun...@developer.marklogic.com] On Behalf Of
Grobstein, Spike
Sent: dinsdag 18 augustus 2009 16:15
To: general@developer.marklogic.com
Subject: [MarkLogic Dev General] using function parameter as
context for cts:search
Hi,
I'm writing a cleanup function that takes a base context to
match to find documents that should be deleted:
(: returns a sequence of URIs that should be deleted in the
context of $base_context (ie: /ra_document) that's older than
$duration :)
declare function cleanup:find($duration as
xs:dayTimeDuration, $base_context as node()*)
{
let $query :=
cts:and-query((
cts:element-range-query(xs:QName('started_at'), '<=',
fn:current-dateTime() - $duration)
))
for $doc in cts:search($base_context, $query)
return (xdmp:node-uri($doc))
};
cleanup:find(xs:dayTimeDuration('P60D'), /some_document)
------------------8< snip --------------------------------------
When I run that, I get an error that the expression is unsearchable.
What I'd like to do is provide a base context to do the
search on (ie: a document node type).
Is there any way to do this?
.spike
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