Hi Michael and Marco,
Thanx for the feedback.
@Marco, setting MIXUPDATES is an efficient work around for suppressing the error message but the cost is that you lose the updating-checks completely. Updating-checks are very useful. @Michael, I'll dive into the XQUF 3.0. Sounds interesting.
Fact stays that the updating check doesn't work, as I see it, properly on the apply-function. Something for Christian to dive into when he is back on holidays ;-)
Again thanx for the replies.
Have fun,
Rob
-----Oorspronkelijk bericht----- Van: basex-talk-bounces@mailman.uni-konstanz.de [mailto:basex-talk-bounces@mailman.uni-konstanz.de] Namens Michael Seiferle Verzonden: dinsdag 29 augustus 2017 21:08 Aan: Marco Lettere CC: basex-talk@mailman.uni-konstanz.de Onderwerp: Re: [basex-talk] Fwd: Re: using apply-function within an updating function
Hi Rob, hi Marco,
First: sorry for not coming back to you earlier.
Glad it worked using mixupdates, but I think there might be a way to make it work using the new XQUF 3.0 "invoke updating" capabilities :-) Christian is currently on holiday, I am sure he will report back on this.
Best from Konstanz,
Michael
Von meinem iPhone gesendet
Am 29.08.2017 um 15:17 schrieb Marco Lettere m.lettere@gmail.com:
Hi Rob, I suppose that if you add MIXUPDATES=true below #LOCAL OPTIONS in the .basex file that you will find in your basex install directory and restart your GUI, the error will not show up any longer in the GUI itself. Regards, Marco.
On 29/08/2017 15:07, r.stapper@lijbrandt.nl wrote: Hi Michael,
Though the GUI still gives an error onth the use of the apply-function within an updating function, my webservices do work correctly. Just added the MIXUPDATES-option in the web.xml file.
Best Rob.
-------- Oorspronkelijke bericht -------- Onderwerp: Re: [basex-talk] using apply-function within an updating function Datum: 29.08.2017 08:06 Afzender: r.stapper@lijbrandt.nl Ontvanger: Michael Seiferle ms@basex.org Kopie: BaseX basex-talk@mailman.uni-konstanz.de
Hi Michael,
Th point is that I am looking for a generic solution which I thought I had found with the use of the apply-function. Most of my webservices take a record with more than one fieldvalue. By putting the fieldvalues in an json-formatted array on the client side and the use of the apply-function on the serverside, see [1], I thought I had found a nice and clean generic solution. Unfortunately this soultion gives me the error: "Function body must be an updating expression".
The issue is that the error is, in my opinion, falsely triggered by the use of the apply-function within updating function. An updating-error-situation should, in my opinion, be determined based on the function that is called by the apply function. In this case though the apply function calls an updating function, Basex still triggeres an updating error.
I cann't use MIXEDUPDATES because my webservices are in a module.
I really would like to use the apply-function here. What to do?
[1] declare %rest:path("/cFactBank/request/new") %rest:PUT("{$dataRec}") %input:json("format=map")
%updating function _:request.new ( $dataRec as array(*) ) { apply( request:new#6 , $dataRec ) } ;
Greetings, Rob
Michael Seiferle schreef op 28.08.2017 18:20:
Hi Rob,
may I ask what you intented to do? Looks like you expect $dataRec to contain exactly one value, right? At least I think so because you called `db:create#1` in `fn:apply` which implies you expect the array to contain a single value.
To create a single database use:
db:create($dataRec => array:get(1)) ```…or… if you want to create a database for each of the array values:
for $db in ($dataRec => array:flatten()) (: Flatten array to a sequence :) return db:create($db). (: create one database per array item :)
…and… last but not least, for "Dynamic Updating Function Invocation“[1] you might use:
let $create := db:create#1 for $db in ($dataRec => array:flatten()) return invoke updating $create($db)
I could not wrap my head around using array:for-each(#2) and dynamic updating function invocation; this could make for a more readable solution, but I can not seem to get the syntax right; if we already fully support it at all ;-)
I hope I did not get you all wrong, feel free to ask for more help! ;-)
Best Michael
[1] https://www.w3.org/TR/xquery-update-30/#id-dynamic-updating-function -invocation
Am 28.08.2017 um 16:42 schrieb r.stapper@lijbrandt.nl:
Hi,
I want to use the apply function within an updating webfunction, see[1] How can this be done?
TIA,
Rob Stapper
[1] declare %rest:path("/cFactBank/dbCreate") %rest:PUT("{$dataRec}") %input:json("format=map")
%updating function _:cFactBank.dbCreate ( $dataRec as array(*) ) { apply( db:create#1 , $dataRec ) } ;