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javascriptmarklogicdata-conversion

How to convert string to date type in MarkLogic?

I am currently having some challenge in converting String data type to Date type. I used the MarkLogic JavaScript function xdmp.parseDateTime, but I am always getting the error below:

Scenario: Convert "2013-04-21" (string) to 2013-04-21 (date type)

Code:

let targetDateString = "2013-04-21";
let targetDate = new Date();

targetDate = xdmp.parseDateTime("[Y0001]-[M01]-[D01]", 
xs.date(targetDate));

Error Info:

XDMP-ARGTYPE: xdmp.parseDateTime("[Y0001]-[M01]-[D01]", xs.date("2013-04-21")) -- arg2 is not of type String

Am I using the right MarkLogic function, supplying the right parameters to it? Or is there a better way to do it?

And how do I cast a date back to a string data type?

Solution

  • xs.date("2013-04-21") is the xquery date constructor (ported to JS), taking a string and returning an xs:date. xs.dateTime("2013-04-21T00:00:00") would get you an xs:dateTime.

    xdmp.parseDateTime can turn a string to xs:dateTime from more formats, the second term is a string: xdmp.parseDateTime("[Y0001]-[M01]-[D01]", targetDateString)

    See https://docs.marklogic.com/xdmp.parseDateTime

    Converting back to a string is just fn.string(yourdate)