如何替换MarkLogic中的节点？

Question

I need to replace the existing node with the new name using MarkLogic of an XML sheet. 我需要使用XML工作表的MarkLogic用新名称替换现有节点。

I don't use Query Console and I write all my code in .sjs file. 我不使用查询控制台，而是将所有代码写在.sjs文件中。 When I have gone through the steps given in MarkLogic docs, it is throwing some errors. 当我完成MarkLogic文档中给出的步骤后，它会抛出一些错误。

Sample code: 样例代码：

<note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>

I have to change tag "from" and replace it as "sender", ie. 我必须更改标签“ from”，并将其替换为“ sender”，即。 expected output: 预期输出：

<note>
  <to>Tove</to>
  <sender>Jani</sender>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>

Java Code: Java代码：

uploading sjs transform from java 从Java上传sjs转换

DatabaseClient client = DatabaseClientFactory.newClient(IP, 8000,
                           DATABASE_NAME, USERNAME, PWD, Authentication.DIGEST);

// get transform mgr
TransformExtensionsManager transMgr = client.newServerConfigManager()
    .newTransformExtensionsManager();
FileInputStream transStream = null;

try {
    transStream = new FileInputStream(path);
} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
InputStreamHandle ipStreamHandle = new InputStreamHandle(transStream);
transMgr.writeJavascriptTransform(JS_TRANSFORM_NAME, ipStreamHandle);
client.release();

Applying the transform before reading the data from MarkLogic. 在从MarkLogic读取数据之前应用转换。 The actual data in database won't be updated 数据库中的实际数据不会被更新

ServerTransform transform = new ServerTransform(transformName);
DatabaseClient client = DatabaseClientFactory.newClient(IP, 8000,
    DATABASE_NAME, USERNAME, PWD, Authentication.DIGEST);
JSONDocumentManager docMgr = clientNew.newJSONDocumentManager();
InputStreamHandle handle = new InputStreamHandle();
docMgr.read("/" + uri + JSON_EXT, handle, transform);
String document = handle.toString();
clientNew.release();
return document;

.sjs code: .sjs代码：

declareUpdate();
var n = new NodeBuilder();
node = n.addElement("sender", "Jani").toNode();

xdmp.nodeReplace(
  cts.doc("/example.xml").xpath("/note/from"),
  node
);

Error: 错误：

Operation not allowed on the currently executing transaction with identifier declareUpdate

Answer 1

First, let me note that you can use JavaScript in Query Console (just change the query type). 首先，请注意，您可以在查询控制台中使用JavaScript（只需更改查询类型）。 I assume you need to put your code into a file so that it will be part of your application, but running in Query Console is a good way to figure out what code you need. 我假设您需要将代码放入文件中，以便它将成为应用程序的一部分，但是在Query Console中运行是确定所需代码的好方法。

That said, the code you provided in the comment is a mix of XQuery and JavaScript. 也就是说，您在注释中提供的代码是XQuery和JavaScript的混合。 xdmp:document-insert() is XQuery -- you can tell by the case, JavaScript doesn't support identifiers with hyphens. xdmp：document-insert（）是XQuery －您可以看出这种情况，JavaScript不支持带连字符的标识符。 The xdmp:nodeReplace should be either xdmp:node-replace (XQuery) or xdmp.nodeReplace (JavaScript). xdmp：nodeReplace应该是xdmp：node-replace（XQuery）或xdmp.nodeReplace（JavaScript）。

The problem you've run into is that XML is not valid content in a JavaScript file -- the < and > symbols are interpreted as less than and greater than. 您遇到的问题是XML不是JavaScript文件中的有效内容-<和>符号被解释为小于和大于。 You can accomplish what you're trying to do with code like this: 您可以使用以下代码完成您要尝试执行的操作：

declareUpdate();

var n = new NodeBuilder();
node = n.addElement("sender", "Jani").toNode();

xdmp.nodeReplace(
  cts.doc("/example.xml").xpath("/note/from"),
  node
);

Before going much further, I think you would benefit from reading the Server-side JavaScript introduction . 在继续之前，我认为您将受益于阅读服务器端JavaScript简介。 That will give you a better foundation for what you're trying to accomplish. 这将为您要完成的工作提供更好的基础。

Edit: In light of additional information from the comments, the solution is that the JavaScript code you're using is intended to update the database, while you want to do a read transformation in memory ( Guidelines for Writing Transforms ). 编辑：根据注释中的其他信息，解决方案是您要使用JavaScript代码更新数据库，同时又要在内存中进行读取转换（编写转换指南）。 Based on Writing JavaScript Transformations , here's what you want instead: 根据编写JavaScript转换，下面是您想要的：

function fromToSender(context, params, content) 
{
  var doc = content.toObject();
  delete doc.note.from;
  doc.sender = 'Jani';
  return doc;
};

exports.transform = fromToSender;

Note that this is a library module with a transform called "fromToSender". 请注意，这是一个带有名为“ fromToSender”的转换的库模块。 Adjust as needed. 根据需要进行调整。

如何替换MarkLogic中的节点？

问题描述

1 个解决方案

解决方案1
4 已采纳 2015-03-31 13:50:58

如何替换MarkLogic中的节点？

问题描述

1 个解决方案

解决方案1 4 已采纳 2015-03-31 13:50:58

解决方案1
4 已采纳 2015-03-31 13:50:58