Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Yes, nice detailed answer Florent. Consider posting this question and answer on
SO to get extra credit.. ;-)
From:
<general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>>
on behalf of Erik Zander
<erik.zan...@studentlitteratur.se<mailto:erik.zan...@studentlitteratur.se>>
Reply-To: MarkLogic Developer Discussion
<general@developer.marklogic.com<mailto:general@developer.marklogic.com>>
Date: Wednesday, February 15, 2017 at 1:57 PM
To: MarkLogic Developer Discussion
<general@developer.marklogic.com<mailto:general@developer.marklogic.com>>
Subject: Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Hi Florent,
Thank you!
Using map:entry solved it and goes with my intentions.
Also thanks for the great explanation it’s obvious why map:map doesn’t work
when its explained well.
Regards
Erik
Från:
general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>
[mailto:general-boun...@developer.marklogic.com] För Florent Georges
Skickat: den 15 februari 2017 12:18
Till: MarkLogic Developer Discussion
<general@developer.marklogic.com<mailto:general@developer.marklogic.com>>
Ämne: Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Hi,
Short answer: what you want is to use map:entry() instead of
map:map(). The following returns true (that is, it stores a document
node as the value of the key "key" in the map):
let $doc := document { }
let $map := map:entry('key', $doc)
return
map:get($map, 'key') instance of document-node()
So what is the difference with the following, which stores an element
node instead?
let $doc := document { }
let $map := map:map(
key
{ $doc }
)
return
map:get($map, 'key') instance of element()
The difference is that the above first copy the document node to an
XML tree. A document node added to an element is just "ignored", its
children get copied directly, as per the XDM recommendation. This XML
tree is used as an XML representation of a map, and "deserialized".
What is in the element map:value *IS* an element node at this point,
so ends up as such in the map.
This might be more clear if we get rid of all the map machinery:
let $doc := document { }
let $elem := { $doc }
return
$elem/node() instance of element()
The value of $elem in this last code is the following (which makes
sense, right?, what else could it be?):
Regards,
--
Florent Georges
H2O Consulting
http://h2o.consulting/
On 15 February 2017 at 11:37, Erik Zander wrote:
Hi All,
I did iron out why I got errors, now I could use some help finding the best
solution to it.
The error is that I have code like
……
let $evalParams := map:map(
document
{$doc}
)
let $resultDocument := xdmp:eval($transformCode, $evalParams)
where in the $transform code it checks for a document-node
declare variable $document as document-node() external;
To my understanding this has to do with the map:map structure.
But is there a good way of going around it. I could use xdmp:unqote but it
feels a bit messy. I could also put into the database but doing document
inserts and deletions just for that feels like a bit much overhead.
Any thoughts on this is greatly appreciated.
Regards
Erik
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Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Hi Florent,
Thank you!
Using map:entry solved it and goes with my intentions.
Also thanks for the great explanation it’s obvious why map:map doesn’t work
when its explained well.
Regards
Erik
Från: general-boun...@developer.marklogic.com
[mailto:general-boun...@developer.marklogic.com] För Florent Georges
Skickat: den 15 februari 2017 12:18
Till: MarkLogic Developer Discussion <general@developer.marklogic.com>
Ämne: Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Hi,
Short answer: what you want is to use map:entry() instead of
map:map(). The following returns true (that is, it stores a document
node as the value of the key "key" in the map):
let $doc := document { }
let $map := map:entry('key', $doc)
return
map:get($map, 'key') instance of document-node()
So what is the difference with the following, which stores an element
node instead?
let $doc := document { }
let $map := map:map(
key
{ $doc }
)
return
map:get($map, 'key') instance of element()
The difference is that the above first copy the document node to an
XML tree. A document node added to an element is just "ignored", its
children get copied directly, as per the XDM recommendation. This XML
tree is used as an XML representation of a map, and "deserialized".
What is in the element map:value *IS* an element node at this point,
so ends up as such in the map.
This might be more clear if we get rid of all the map machinery:
let $doc := document { }
let $elem := { $doc }
return
$elem/node() instance of element()
The value of $elem in this last code is the following (which makes
sense, right?, what else could it be?):
Regards,
--
Florent Georges
H2O Consulting
http://h2o.consulting/
On 15 February 2017 at 11:37, Erik Zander wrote:
Hi All,
I did iron out why I got errors, now I could use some help finding the best
solution to it.
The error is that I have code like
……
let $evalParams := map:map(
document
{$doc}
)
let $resultDocument := xdmp:eval($transformCode, $evalParams)
where in the $transform code it checks for a document-node
declare variable $document as document-node() external;
To my understanding this has to do with the map:map structure.
But is there a good way of going around it. I could use xdmp:unqote but it
feels a bit messy. I could also put into the database but doing document
inserts and deletions just for that feels like a bit much overhead.
Any thoughts on this is greatly appreciated.
Regards
Erik
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Re: [MarkLogic Dev General] passing a document-node into an eval/invoke
Hi,
Short answer: what you want is to use map:entry() instead of
map:map(). The following returns true (that is, it stores a document
node as the value of the key "key" in the map):
let $doc := document { }
let $map := map:entry('key', $doc)
return
map:get($map, 'key') instance of document-node()
So what is the difference with the following, which stores an element
node instead?
let $doc := document { }
let $map := map:map(
key
{ $doc }
)
return
map:get($map, 'key') instance of element()
The difference is that the above first copy the document node to an
XML tree. A document node added to an element is just "ignored", its
children get copied directly, as per the XDM recommendation. This XML
tree is used as an XML representation of a map, and "deserialized".
What is in the element map:value *IS* an element node at this point,
so ends up as such in the map.
This might be more clear if we get rid of all the map machinery:
let $doc := document { }
let $elem := { $doc }
return
$elem/node() instance of element()
The value of $elem in this last code is the following (which makes
sense, right?, what else could it be?):
Regards,
--
Florent Georges
H2O Consulting
http://h2o.consulting/
On 15 February 2017 at 11:37, Erik Zander wrote:
> Hi All,
>
>
>
> I did iron out why I got errors, now I could use some help finding the
> best solution to it.
>
>
>
> The error is that I have code like
>
>
>
> ……
>
>
>
> let $evalParams := map:map(
>
>
> xmlns:map='http://marklogic.com/xdmp/map'>
>
>
>
> document
>
> {$doc}
>
>
>
> )
>
> let $resultDocument := xdmp:eval($transformCode, $evalParams)
>
>
>
> where in the $transform code it checks for a document-node
>
> declare variable $document as document-node() external;
>
>
>
> To my understanding this has to do with the map:map structure.
>
>
>
> But is there a good way of going around it. I could use xdmp:unqote but it
> feels a bit messy. I could also put into the database but doing document
> inserts and deletions just for that feels like a bit much overhead.
>
>
>
> Any thoughts on this is greatly appreciated.
>
>
>
> Regards
>
> Erik
>
> ___
> General mailing list
> General@developer.marklogic.com
> Manage your subscription at:
> http://developer.marklogic.com/mailman/listinfo/general
>
>
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