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vikrams57194913
Level 2
November 18, 2021

Sling Model with custom selector not working in AEM 6.5

  • November 18, 2021
  • 2 replies
  • 7780 views

Hi All,

 

I am using a Sling model exporter to export json data in AEM 6.5 and using the selector "caas". When the selector is "model" , it works perfectly. However with custom selector , it shows the below error.

 

Invalid recursion selector value 'caas'

Cannot serve request to /content/abc/internal/exportsite/en/clientaccess/help/secondlevela/level3.caas.json in org.apache.sling.servlets.get.DefaultGetServlet

 

Already tried the below:

check if this helps - Re: Sling Exporter with custom selector

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2 replies

Asutosh_Jena_
Community Advisor
Asutosh_Jena_Community Advisor
Community Advisor
November 18, 2021

Hi @vikrams57194913 

 

Is /content/abc/internal/exportsite/en/clientaccess/help/secondlevela/level3 a page?

Did you try with /content/abc/internal/exportsite/en/clientaccess/help/secondlevela/level3/jcr:content.caas.json?

 

Thanks!

    V
    vikrams57194913Author
    Level 2
    November 18, 2021

    I am getting blank page with the above link also, only getting response from model.json

     

    Thanks

      V
      vikrams57194913Author
      Level 2
      November 19, 2021

      We need to provide implementation for all methods and delegate. We can make use of lombok @Delegate annotation for this - https://www.initialyze.com/blog/2020/11/simplify-extending-sling-models-with-lombok/

       

      Also, note that your custom interface(PageExporter) has methods in the same name as OOTB core Page interface. Cross check the same and rename/remove based on your need. 

       

      You can use the below and see if it works. 

      package com.aem.demoproject.core.models;

import com.adobe.cq.export.json.ComponentExporter;
import com.adobe.cq.export.json.ExporterConstants;
import com.day.cq.wcm.api.Page;
import lombok.experimental.Delegate;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.models.annotations.Exporter;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.Via;
import org.apache.sling.models.annotations.injectorspecific.Self;
import org.apache.sling.models.annotations.via.ResourceSuperType;

import javax.inject.Inject;
import java.util.Map;

@Model(adaptables = SlingHttpServletRequest.class, adapters = {com.adobe.cq.wcm.core.components.models.Page.class}, resourceType = PageExporterImpl.RESOURCE_TYPE)
@Exporter(name = ExporterConstants.SLING_MODEL_EXPORTER_NAME, selector = "mobile", extensions = ExporterConstants.SLING_MODEL_EXTENSION)
public class PageExporterImpl implements com.adobe.cq.wcm.core.components.models.Page {

    protected static final String RESOURCE_TYPE = "demoproject/components/structure/page";

    @Inject
    private Page currentPage;

    @Delegate(types = com.adobe.cq.wcm.core.components.models.Page.class, excludes = Handled.class)
    @Self
    @Via(type = ResourceSuperType.class)
    private com.adobe.cq.wcm.core.components.models.Page pageDelegate;

    @Override
    public Map<String, ? extends ComponentExporter> getExportedItems() {
        return pageDelegate.getExportedItems();
    }

    public String getMessage() {
        return "Custom Page Exporter Impl";
    }

    protected static interface Handled {
        public Map<String, ? extends ComponentExporter> getExportedItems();
    }
}

      Result :

       


      Getting below error with the above code:
      <h1>Error during include of component 
      '/apps/contentservices/components/structure/page'</h1><h3>Error Message:</h3>
<pre>org.apache.sling.models.factory.MissingElementsException: 
      Could not inject all required fields into class 
      ca.demo.web.contentservices.core.impl.PageExporterImpl</pre><h3>Processing Info:</h3>
<table style='font-family: monospace'>
<tr><td>Page</td><td>=</td><td>
      /content/demo/internal/exportsite/en/clientaccess/help/secondlevela/level3<td></tr><tr>
      <td>Resource Path</td><td>=</td><td>/content/demo/internal/exportsite/en/clientaccess/help
      /secondlevela/level3/jcr:content<td></tr><tr><td>Cell</td><td>=</td><td>page<td></tr><tr>
      <td>Cell Search Path</td><td>=</td><td>page|basicpage<td></tr><tr><td>Component Path</td>
      <td>=</td><td>/apps/contentservices/components/structure/page<td></tr></table>
<h3>Sling Request Progress:</h3>

      I also applied defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL 
      in the model, after that getting Null pointer exception on language etc.

      Thanks
        V
        vugaraghayev
        September 21, 2022

        Hi Vikram, 

        Add the caas.json.jsp file in the project and update its content as below: 

         

        /apps/cq/Page/caas.json.jsp 

        <%@include file="/libs/cq/Page/proxy.jsp" %>

         

        Update the workspace filter so changes are picked up: 

        <filter root="/apps/cq/Page">

         

        This should work. You can add multiple selectors with this way. 

         

        Another solution is to combine your custom selector with the OOTB model selector e.g model.caas

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