Checking for missing attribute with cts: query
I have an XML fragment where I want to have different requests based on the presence of an id attribute:
<author order="1"
id="99999999"
initials="A."
given-names="Able"
surname="Baker"
fullname="Able Baker"/>
I tried:
let $first-query := if ($first)
then cts:or-query((
cts:element-attribute-word-match(xs:QName("author"), xs:QName("given-names"), $first || "*", ("collation=http://marklogic.com/collation/codepoint")),
cts:element-attribute-word-match(xs:QName("author"), xs:QName("initials"), $first || "*", ("collation=http://marklogic.com/collation/codepoint"))
))
else ()
let $last-query := if ($last)
then cts:element-attribute-word-match(xs:QName("author"), xs:QName("surname"), $last || "*", ("collation=http://marklogic.com/collation/codepoint"))
else ()
let $author-no-id-query :=
cts:and-query((
cts:not-query(
cts:element-attribute-value-query(xs:QName("author"), xs:QName("id"), "*")
),
$first-query,
$last-query
))
let $query := cts:element-query(xs:QName("author"),
cts:or-query(($author-no-id-query, $author-id-query
)))
If the identifier exists, then another request is made and a match with the identifier occurs. How to detect missing attribute in MarkLogic?
+3
source to share
1 answer
I entered two test documents into the database:
xdmp:document-insert('/example.xml', <author order="1"
id="99999999"
initials="A."
given-names="Able"
surname="Baker"
fullname="Able Baker"/>)
xdmp:document-insert('/example2.xml', <author order="1"
initials="A."
given-names="Able"
surname="Baker"
fullname="Able Baker"/>)
And run the following query against these docs:
cts:search(fn:doc(),
cts:element-query(xs:QName('author'), cts:and-query((
cts:not-query(cts:element-attribute-value-query(xs:QName('author'), xs:QName('id'), '*', ("wildcarded")))
)
)))
This search only matches a document where the ID attribute does not exist.
+2
source to share