TagManager resolve not working

[AD-Engineer]

Hi,

I am trying to create a filter component - to filter based on tags. The idea is to pass tags from a specific path to front, so user can choose from dropdown.

I am having an issue, with Tag Manager methods, like resolve.

Code below:

 @Override
    public String getAllTags(){
        Tag tag = null;
        TagManager tagManager = null;
    
        tagManager =  resourceResolver.adaptTo(TagManager.class);
        tag = tagManager.resolveByTitle("Region");
      

        String name = tagManager.getNamespaces()[3].getTitle();
        return tag.getPath();
    }

This is just a test method. I know that the return type should be List<Tag>, but for now I just want to get a specific tag path, to understand hot this works. But it is returning null. I know most of the times this issue is related to user permissions, but I already updated the permission to read for content/cq:tags. Thanks!

[Asutosh_Jena_ · Accepted solution]

Hi @AD-Engineer 

Please follow the below approach:

Create a VO/POJO class with all the desired fields. I added only 2 for DEMO.

public class TagVO {
    private String tagName;
    private String tagTitle;

    public String getTagName() {
        return tagName;
    }

    public void setTagName(String tagName) {
        this.tagName = tagName;
    }

    public String getTagTitle() {
        return tagTitle;
    }

    public void setTagTitle(String tagTitle) {
        this.tagTitle = tagTitle;
    }
}

 Create a Model class and call it in component:

@Model(adaptables = Resource.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class TestModel {

    private static final Logger log = LoggerFactory.getLogger(TestModel.class);

    @SlingObject
    private ResourceResolver resourceResolver;

    private List<TagVO> tagList;

    @PostConstruct
    protected void init() {
        log.info("***** :: Start :: *****");
        tagList = new ArrayList<>();
        String tagPath = "/content/cq:tags/brands/whatever"; // Here you will pass the parent path to all tags. Ensure anonumous user access is there for this path.
        TagManager tagManager = resourceResolver.adaptTo(TagManager.class);
        if (tagManager != null) {
            Tag tagFromPath = tagManager.resolve(tagPath);
            Iterator<Tag> tagIterator = tagFromPath.listChildren();
            tagIterator.forEachRemaining(tag -> {
                TagVO tagVO = new TagVO();
                tagVO.setTagName(tag.getName());
                tagVO.setTagTitle(tag.getTitle());
                tagList.add(tagVO);
            });
        }
        log.info("***** :: End :: *****");
    }

    public List<TagVO> getTagList() {
        return tagList;
    }
}

HTL:

<sly data-sly-use.menuobj="com.aem.core.models.TestModel">
    <sly data-sly-list.listObj="${menuobj.tagList}">
        <li value="${listObj.tagName}">${listObj.tagTitle}</li>
    </sly>
</sly>

HTL script can be modified to show as dropdown. I just added as simple list item.

Hope this helps!

Thanks 

[AD-Engineer]

@Asutosh_Jena_ this worked great! Thanks a lot!