[英]Filter records Marklogic using XQuery
I am trying to execute a query, but I am retrieving also records that I don't want to retrieve.我正在尝试执行查询,但我也在检索我不想检索的记录。
const rslt = cts.uris("", ["limit=500"],
cts.andQuery(
[
cts.jsonPropertyValueQuery("language","java"),
cts.collectionQuery("http://marklogic.com/collections/dls/latest-version"),
])
)
rslt
Based on the JSON:基于JSON:
{
id: 1,
language: [
"java"
]
},
{
id: 2,
language: [
"java", "C++"
]
}
I would like to retrieve the records with only java
value, at the moment is retrieving 2 documents.我想检索只有java
值的记录,目前正在检索 2 个文档。
What conditional should I use to get only the document with language java
, record 1 ?我应该使用什么条件来仅获取语言为java
,记录 1 的文档?
In MarkLogic, each JSON array value is a value of its associated property.在 MarkLogic 中,每个 JSON 数组值都是其关联属性的值。
Given below input:给出以下输入:
/stock/1.json
{
"id": 1,
"language": ["java"]
}
/stock/2.json
{
"id": 2,
"language": ["java", "C++"]
}
MarkLogic JavaScript: MarkLogic JavaScript:
const result = [];
const uris = cts.uris('', ['limit=500'],
cts.andQuery([cts.collectionQuery('asset'),
cts.andNotQuery(
cts.jsonPropertyValueQuery('language', 'java'),
cts.jsonPropertyValueQuery('language', 'C++'))
])
);
for (var uri of uris){
result.push({'docId': uri})
}
result
or要么
const result = [];
const uris = cts.uris('', ['limit=500'],
cts.andQuery([cts.collectionQuery('asset'),
cts.jsonPropertyValueQuery('language', 'java'),
cts.notQuery(cts.jsonPropertyValueQuery('language', 'C++'))
])
);
for (var uri of uris){
result.push({'docId': uri})
}
result
Of course, above JavaScript has its XQuery equivalent.当然,上面的 JavaScript 有它的 XQuery 等价物。
Other than that, below MarkLogic XQuery would do:除此之外,在 MarkLogic XQuery 下面会做:
for $doc in fn:collection("asset")
let $lang := $doc/language
where count($lang) = 1 and $lang/data() = "java"
return
<docId>
{xdmp:node-uri($doc)}
</docId>
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