Access to a property in a specific resource via sightly

问题

I want to access to a specific property in resource.

The main resource hat two children and the app is in the first one. I want to get a property from the second child.

Can i find something like :

 ${resource.parent.child[1].valueMap.title}

Thanks!

回答1:

To start - note that the order of the children may not be guaranteed, unless you're using sling:OrderedFolder or some other ordered type. So trying to get the "second" child may not even make sense.

Having said that, there may some valid use cases that I am not thinking of for needing to get the second child -- as far as I can tell you will need to create a Java or JS object and make use of the Use Api.

Simple Example Java object

package apps.your_app.components.yourComponent;

import com.adobe.cq.sightly.WCMUsePojo;
import org.apache.sling.api.resource.Resource;

import java.util.Iterator;

public class Model extends WCMUsePojo {

    @Override
    public void activate() throws Exception {
        //do some stuff if needed
    }

    public Resource getSecondSibling() {
        Resource parent = getResource().getParent();
        Resource secondSib = null;
        Iterator<Resource> children = parent.listChildren();

        //find the second child
        for (int i = 0; i < 2; i++)
            secondSib = children.next();
        return secondSib;
    }
}

Using it in the sightly:

<sly data-sly-use.model="Model">${model.secondSibling.propertyName}</sly>

回答2:

Here's another example that i used with converting the content to JSON. The contents of the JSON as parsed Objects and each Object has Attributes.

<div data-sly-use.jsonHelper="${'com.service.helpers.JSONHelper'
  @json=model.getRawJson}">

  ${jsonHelper.parsedJSON[item].commodityList[subitem].name}
  ...
</div>

来源：https://stackoverflow.com/questions/39751000/access-to-a-property-in-a-specific-resource-via-sightly

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sling

sightly