You can always try using cardinality ?. This will allow you to pass (0,1)
arguments to function. Of course you have check the value with
fn:exists($sessionId) and handle case accordingly
xutils:validateSession($sessionId as xs:string?) {..}
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Today's Topics:
1. Re: Passing empty value to function not working (David Ennis)
2. Re: Passing empty value to function not working (David Lee)
----------------------------------------------------------------------
Message: 1
Date: Fri, 26 Sep 2014 13:14:50 +0200
From: David Ennis <[email protected]>
Subject: Re: [MarkLogic Dev General] Passing empty value to function
not working
To: MarkLogic Developer Discussion <[email protected]>
Message-ID:
<cabbx6anv9uud8t9jyb5ydas5w3ywszvemd0dtyjwupcfozn...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
?Hi
MarkLogic allows for function overloading. Perhaps that could be your
solution..
Kind Regards,
David Ennis?
Kind Regards,
David Ennis
David Ennis
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On 26 September 2014 13:00, Kapoor, Pragya <[email protected]> wrote:
> Hi,
>
>
> I need to pass an empty value to util function, which is not working.
>
>
> declare function xutils:validateSession($sessionId as xs:string) {
>
> if($sessionId ne "" ) then
> let $document := fn:doc($config:USER_SESSIONS)
> <errorCode>
> <code>500</code>
> <description>server error</description>
> </errorCode>
> else
> <errorCode>
> <code>517</code>
> <description>Session Id can't be empty</description>
> </errorCode>
>
> };
>
> I am calling this function from some other file and it is returing an
> empty sequence.But if I make this function
> local:validateSession($sessionId as xs:string) then its working.
>
> Calling file:
> import module namespace config = "config"
> at "/rest-apis/utils/config.xqy";
>
> let $node := '<inputString>
>
> <sessionId></sessionId>
> </inputString>'
>
>
>
> let $node := xdmp:unquote($node)
> let $sessionId := $node//sessionId/text() ?return let $validateFlag
> := xutils:validateSession($sessionId)
> return
>
> $validateFlag
>
> Please advice.
>
> Thanks
> Pragya
>
>
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>
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Message: 2
Date: Fri, 26 Sep 2014 12:08:06 +0000
From: David Lee <[email protected]>
Subject: Re: [MarkLogic Dev General] Passing empty value to function
not working
To: MarkLogic Developer Discussion <[email protected]>
Message-ID:
<6ad72d76c2d6f04d8be471b70d4b991e04c9b...@exchg10-be02.marklogic.com>
Content-Type: text/plain; charset="utf-8"
Almost certainly this is due to "xdmp:mapping" being on
https://docs.marklogic.com/guide/xquery/enhanced#id_55459
https://docs.marklogic.com/guide/xquery/langoverview#id_45023
For some this is an incredible feature. For others its surprising and
difficult to debug .
Its ON by default.
In short, what it does is call functions that have an argument that can take
exactly 1 of something N times depending on the argument you pass so you don?t
have to write for loops. A side effect is that if N is 0 then the function is
never called.
I recommend that until you understand and decide for yourself if this is
incredibly useful or too confusing to disable it.
Add this line right under the version line in your XQuery files
declare option xdmp:update "false";
However, you do have another issue ... you have declared your function to take
exactly 1 argument ...
So when you turn this off, instead of not calling your function you will get an
error.
You need to either change your function signature to allow the parameter to be
empty, or pass in a zero length string.
It looks like your function is expecting "" instead of () -- which means that
your XPath is finding no text nodes let $sessionId := $node//sessionId/text()
This use of text() is generally discouraged. Unless you absolutely positively
know you need to use text(), don?t. Just don?t do it.
Instead use string()
let $sessionId := fn:string($node//sessionId)
( you can scan the archives of the various XQuery forums for a decade long
debate on this if your curious)
Now this will give you an error if there is > 1 node with a seesionID element
... but your code is not setup to handle N nodes so that?s probably for the
best.
From: [email protected]
[mailto:[email protected]] On Behalf Of Kapoor, Pragya
Sent: Friday, September 26, 2014 7:01 AM
To: [email protected]
Subject: [MarkLogic Dev General] Passing empty value to function not working
Hi,
I need to pass an empty value to util function, which is not working.
declare function xutils:validateSession($sessionId as xs:string) {
if($sessionId ne "" ) then
let $document := fn:doc($config:USER_SESSIONS)
<errorCode>
<code>500</code>
<description>server error</description>
</errorCode>
else
<errorCode>
<code>517</code>
<description>Session Id can't be empty</description>
</errorCode>
};
I am calling this function from some other file and it is returing an empty
sequence.But if I make this function local:validateSession($sessionId as
xs:string) then its working.
Calling file:
import module namespace config = "config"
at "/rest-apis/utils/config.xqy";
let $node := '<inputString>
<sessionId></sessionId>
</inputString>'
let $node := xdmp:unquote($node)
let $sessionId := $node//sessionId/text() ?return let $validateFlag :=
xutils:validateSession($sessionId)
return
$validateFlag
Please advice.
Thanks
Pragya
"This e-mail and any attachments transmitted with it are for the sole use of
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privileged information. If you are not the intended recipient, please contact
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unauthorized review, use, disclosure, dissemination, forwarding, printing or
copying of this e-mail or any action taken in reliance on this e-mail is
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