在Marklogic Javascript中实现For Loop? [英] Implement For Loop in Marklogic Javascript?

问题描述

我可以使用下面的XQuery获取集合中所有文档的URI:

I can get all the URIs of the documents in a collection by using below XQuery:

for $doc in fn:collection("transform") 
return xdmp:node-uri($doc)

但是，当我尝试在MarkLogic的Javascript模块中实现此功能时，它仅获取数据库集合中的最后一个文档.

But, when I tried to implement this in a Javascript module in MarkLogic, it is getting only last document in the database collection.

'use strict';
declareUpdate()
var docs = fn.collection("transform");
for(var doc of docs) {
  xdmp.nodeUri(doc)
}

它没有提供集合中的所有URI，而是仅返回文档的最后一个URI.

It is not giving all the URIs in the collection, but rather it's only returning the last URI of the document.

如何获取它以返回所有URI?

How can I get it to return all of the URIs?

推荐答案

创建一个数组并将每个URI添加到for循环中的该数组中，然后返回该数组:

Create an array and add each of the URIs to that array in your for loop, then either return the array:

'use strict';
declareUpdate()
var docs = fn.collection("transform");
var results = [];
for (var doc of docs) {
 results.push(xdmp.nodeUri(doc));
}
results;

或使用 Sequence.from() :

'use strict';
declareUpdate()
var docs = fn.collection("transform");
var results = [];
for (var doc of docs) {
 results.push(xdmp.nodeUri(doc));
}
Sequence.from(results);

但是，如果您只想返回URI，则使用 cts.uris() 和 cts.collectionQuery() :

However, if you simply want to return the URIs, then it would be better/easier to use cts.uris() with a cts.collectionQuery():

'use strict';
declareUpdate();
cts.uris("", null, cts.collectionQuery("transform"));

这篇关于在Marklogic Javascript中实现For Loop?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！