Radically easy to access on brand approved content for distribution and omnichannel performant delivery. AEM Assets Content Hub and Dynamic Media with OpenAPI capabilities is now GA.
SOLVED
How to get content of Fragment Reference in my content fragment using sling model?
I have a custom component of type 'Content Fragment List' that returns a list of content fragments.
Each content fragment has a data type 'Fragment Reference' that brings another content fragment with fields like Name, Direction, etc. How can I access the values of the content fragment added to my returning list fragment and display these values on the front-end?
I am using the same structure as the core model 'Content Fragment List'.
package com.myproject.core.models.impl;
import java.util.*;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.jcr.Session;
import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.models.annotations.Default;
import org.apache.sling.models.annotations.Exporter;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.injectorspecific.InjectionStrategy;
import org.apache.sling.models.annotations.injectorspecific.Self;
import org.apache.sling.models.annotations.injectorspecific.SlingObject;
import org.apache.sling.models.annotations.injectorspecific.ValueMapValue;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.adobe.cq.dam.cfm.converter.ContentTypeConverter;
import com.adobe.cq.export.json.ComponentExporter;
import com.adobe.cq.export.json.ExporterConstants;
import com.adobe.cq.wcm.core.components.util.AbstractComponentImpl;
import com.myproject.core.models.ContentFragmentList;
import com.myproject.core.models.DAMContentFragment;
import com.day.cq.commons.jcr.JcrConstants;
import com.day.cq.search.Predicate;
import com.day.cq.search.PredicateGroup;
import com.day.cq.search.Query;
import com.day.cq.search.QueryBuilder;
import com.day.cq.search.result.SearchResult;
import com.day.cq.tagging.TagConstants;
import static com.day.cq.dam.api.DamConstants.NT_DAM_ASSET;
@Model(
adaptables = SlingHttpServletRequest.class,
adapters = {
ContentFragmentList.class,
ComponentExporter.class
},
resourceType = {ContentFragmentListImpl.RESOURCE_TYPE_V1,ContentFragmentListImpl.RESOURCE_TYPE_V2}
)
@Exporter(name = ExporterConstants.SLING_MODEL_EXPORTER_NAME, extensions = ExporterConstants.SLING_MODEL_EXTENSION)
public class ContentFragmentListImpl extends AbstractComponentImpl implements ContentFragmentList {
private static final Logger LOG = LoggerFactory.getLogger(ContentFragmentListImpl.class);
public static final String RESOURCE_TYPE_V1 = "core/wcm/components/contentfragmentlist/v1/contentfragmentlist";
public static final String RESOURCE_TYPE_V2 = "core/wcm/components/contentfragmentlist/v2/contentfragmentlist";
public static final String DEFAULT_DAM_PARENT_PATH = "/content/dam";
public static final int DEFAULT_MAX_ITEMS = -1;
@Self(injectionStrategy = InjectionStrategy.REQUIRED)
private SlingHttpServletRequest slingHttpServletRequest;
@Inject
private ContentTypeConverter contentTypeConverter;
@SlingObject
private ResourceResolver resourceResolver;
@ValueMapValue(name = ContentFragmentList.PN_MODEL_PATH, injectionStrategy = InjectionStrategy.OPTIONAL)
@Nullable
private String modelPath;
@ValueMapValue(name = ContentFragmentList.PN_ELEMENT_NAMES, injectionStrategy = InjectionStrategy.OPTIONAL)
@Nullable
private String[] elementNames;
@ValueMapValue(name = ContentFragmentList.PN_TAG_NAMES, injectionStrategy = InjectionStrategy.OPTIONAL)
@Nullable
private String[] tagNames;
@ValueMapValue(name = ContentFragmentList.PN_PARENT_PATH, injectionStrategy = InjectionStrategy.OPTIONAL)
@Nullable
private String parentPath;
@ValueMapValue(name = ContentFragmentList.PN_MAX_ITEMS, injectionStrategy = InjectionStrategy.OPTIONAL)
@Default(intValues = DEFAULT_MAX_ITEMS)
private int maxItems;
@ValueMapValue(name = ContentFragmentList.PN_ORDER_BY, injectionStrategy = InjectionStrategy.OPTIONAL)
@Default(values = JcrConstants.JCR_CREATED)
private String orderBy;
@ValueMapValue(name = ContentFragmentList.PN_SORT_ORDER, injectionStrategy = InjectionStrategy.OPTIONAL)
@Default(values = Predicate.SORT_ASCENDING)
private String sortOrder;
private final List<DAMContentFragment> items = new ArrayList<>();
@PostConstruct
private void initModel() {
// Default path limits search to DAM
if (StringUtils.isEmpty(parentPath)) {
parentPath = DEFAULT_DAM_PARENT_PATH;
}
if (StringUtils.isEmpty(modelPath)) {
LOG.warn("Please provide a model path");
return;
}
Session session = resourceResolver.adaptTo(Session.class);
if (session == null) {
LOG.warn("Session was null therefore no query was executed");
return;
}
QueryBuilder queryBuilder = resourceResolver.adaptTo(QueryBuilder.class);
if (queryBuilder == null) {
LOG.warn("Query builder was null therefore no query was executed");
return;
}
Map<String, String> queryParameterMap = new HashMap<>();
queryParameterMap.put("path", parentPath);
queryParameterMap.put("type", NT_DAM_ASSET);
queryParameterMap.put("p.limit", Integer.toString(maxItems));
queryParameterMap.put("1_property", JcrConstants.JCR_CONTENT + "/data/cq:model");
queryParameterMap.put("1_property.value", modelPath);
if (StringUtils.isNotEmpty(orderBy)) {
queryParameterMap.put("orderby", "@" + orderBy);
if (StringUtils.isNotEmpty(sortOrder)) {
queryParameterMap.put("orderby.sort", sortOrder);
}
}
ArrayList<String> allTags = new ArrayList<>();
if (tagNames != null && tagNames.length > 0) {
allTags.addAll(Arrays.asList(tagNames));
}
if (!allTags.isEmpty()) {
// Check for the taggable mixin
queryParameterMap.put("2_property", JcrConstants.JCR_CONTENT + "/metadata/" + JcrConstants.JCR_MIXINTYPES);
queryParameterMap.put("2_property.value", TagConstants.NT_TAGGABLE);
// Check for the actual tags (by default, tag are or'ed)
queryParameterMap.put("tagid.property", JcrConstants.JCR_CONTENT + "/metadata/cq:tags");
for (int i = 0; i < allTags.size(); i++) {
queryParameterMap.put(String.format("tagid.%d_value", i + 1), allTags.get(i));
}
queryParameterMap.put("tagid.and", "true");
}
PredicateGroup predicateGroup = PredicateGroup.create(queryParameterMap);
Query query = queryBuilder.createQuery(predicateGroup, session);
SearchResult searchResult = query.getResult();
LOG.debug("Query statement: '{}'", searchResult.getQueryStatement());
// Query builder has a leaking resource resolver, so the following work around is required.
ResourceResolver leakingResourceResolver = null;
try {
// Iterate over the hits if you need special information
Iterator<Resource> resourceIterator = searchResult.getResources();
while (resourceIterator.hasNext()) {
Resource resource = resourceIterator.next();
if (leakingResourceResolver == null) {
// Get a reference to QB's leaking resource resolver
leakingResourceResolver = resource.getResourceResolver();
}
DAMContentFragment contentFragmentModel = new DAMContentFragmentImpl(
resource, contentTypeConverter, null, elementNames);
items.add(contentFragmentModel);
}
} finally {
if (leakingResourceResolver != null) {
// Always close the leaking query builder resource resolver
leakingResourceResolver.close();
}
}
}
@NotNull
@Override
public Collection<DAMContentFragment> getListItems() {
return Collections.unmodifiableCollection(items);
}
@NotNull
@Override
public String getExportedType() {
return slingHttpServletRequest.getResource().getResourceType();
}
}
1 Accepted Solution
Hello @NathanVieira
Please refer to the following Blog
https://kiransg.com/2021/11/13/aem-get-linked-content-fragments-content/
It shares a working code where Agents CF is linked to Car CF.
Concept of Synthetic resource is used fetch values of Agents CF via Sling Model
Aanchal Sikka
