Hi Manoj, What custom constraints allow you to do is provide your own code that plugs in to do string parsing and faceting in your own way, while still taking advantage of other parts of the underlying API.
The <parse> tag lets you plug in code to tell the parser how to construct queries from tokens that start with "lesson:" (because that's your constraint name). The <start-facet> (which you're not using here) lets you specify how to extract a list of values for your facet; and the <finish-facet> tags let you customize how those values should be processed. Those two steps are treated separately, because doing so lets the API parallelize the calls that extract the values. So these are all "hooks" for customizing the meaning of "lesson" in the search grammar. To figure out what might be happening, I think we need a little more information. What custom behavior are you trying to accomplish with your facets? What might help most is that you're referencing custom code in facets.xqy...can you share that code? Did you install the code on the server? And when you get no results, are you seeing any error messages? --Colleen ________________________________ From: [email protected] [[email protected]] on behalf of manoj viswanadha [[email protected]] Sent: Thursday, July 18, 2013 3:39 AM To: MarkLogic Developer Discussion Subject: [MarkLogic Dev General] Creating custom facets using custom constarints in Rest API Hi all, I am exploring the options of creating custom facets. I got the option of using custom constarints mentioned in REST API document. I am using the below options: < constraint name="lesson"> < custom facets="true"> < parse apply="parse" ns= " at="/facets.xqy" /> <finish-facet apply="finish-facet" ns="http://marklogic.com/rest-api/transform/facets"; at="/facets.xqy"/> </search:custom> <range collation="http://marklogic.com/collation//S2"; type="xs:string" facet="true"> <facet-option>ascending</facet-option> <facet-option>limit=10</facet-option> <path-index>*:level[@level_number=2]/*:title</path-index> </search:range> </constraint> The Service i am calling is: http://localhost:portno/v1/search?q=&options=test&format=xml&collection=Resources&view=facets When i use custom option i am not getting results and when i remove custom option i am able to get results. Does custom constraints work for facets? Can anyone help me in this. I want to change the default structure of facets. Thanks in advance, Manoj.
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