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Rob Lindbloom
Join with DynamicQuery
December 19, 2008 2:08 PM
Answer

Rob Lindbloom

Rank: New Member

Posts: 15

Join Date: October 16, 2008

Recent Posts

I'm trying to do a SQL inner join using DynamicQuery. I can't find too much information on how to do this. I'm trying to join JournalArticle with Ratings or RatingStats. Has anyone implemented this using JournalArticle.findByDynamicQuery()?

Thanks, Rob
Jonas Yuan
RE: Join with DynamicQuery
December 19, 2008 2:51 PM
Answer

Jonas Yuan

Rank: Liferay Master

Posts: 993

Join Date: April 26, 2007

Recent Posts

Hi Rob,

Here is a real example -getting most popular articles TOP 10 - abstracted from 1st draft of Chapter 8: Building My Community - Liferay DEV BOOK.

public List<TagsAsset> getMostPopularArticles(String companyId, String groupId, String type, int limit) {
List<TagsAsset> results = Collections.synchronizedList(new ArrayList<TagsAsset>());
DynamicQuery dq0 = DynamicQueryFactoryUtil.forClass(JournalArticle.class, "journalarticle")
.setProjection(ProjectionFactoryUtil.property("resourcePrimKey"))
.add(PropertyFactoryUtil.forName("journalarticle.companyId").eqProperty("tagsasset.companyId"))
.add(PropertyFactoryUtil.forName("journalarticle.groupId").eqProperty("tagsasset.groupId"))
.add(PropertyFactoryUtil.forName("journalarticle.type").eq("article-content"));
DynamicQuery query = DynamicQueryFactoryUtil.forClass(TagsAsset.class, "tagsasset")
.add(PropertyFactoryUtil.forName("tagsasset.classPK").in(dq0))
.addOrder(OrderFactoryUtil.desc("tagsasset.viewCount"));
try{
List<Object> assets = TagsAssetLocalServiceUtil.dynamicQuery(query);
int index = 0;
for (Object obj: assets) {
TagsAsset asset = (TagsAsset)obj;
results.add(asset);
index ++;
if(index == limit) break;
}
}catch (Exception e){
_log.debug("Error: " + e.getMessage());
return results;
}
return results;
}

Enjoy!

Jonas Yuan
Liferay Book: Liferay Portal Enterprise Intranets
Rob Lindbloom
RE: Join with DynamicQuery
December 19, 2008 3:25 PM
Answer

Rob Lindbloom

Rank: New Member

Posts: 15

Join Date: October 16, 2008

Recent Posts

Jonus... thanks for your quick reply on a Friday no less. I'll give this a try!

Gratefully, Rob
Ruben Aguilera
RE: Join with DynamicQuery
July 10, 2009 8:21 PM
Answer

Ruben Aguilera

Rank: Junior Member

Posts: 47

Join Date: February 25, 2009

Recent Posts

Hi Jonas,

First, congratulations for your new book, I have it and I think that's fantastic.

I was thinking if you could give me an example about join three tables with a dynamicquery. Specifically, I want to know how I make a join with TagsAsset, TagsEntry and TagsAssets_TagsEntries tables using a dynamicquery like example in first comment but with these three tables.

I need that to finish an important portlet in my job. Thank you very much.
Ezequiel Turovetzky
RE: Join with DynamicQuery
January 29, 2013 3:56 PM
Answer

Ezequiel Turovetzky

Rank: New Member

Posts: 12

Join Date: July 4, 2012

Recent Posts

Thanks a lot for that snippet!
Sikendar Kumar
Unable to see tags for guest users in liferay 6.2
October 10, 2017 3:48 AM
Answer

Sikendar Kumar

Rank: New Member

Posts: 18

Join Date: September 2, 2015

Recent Posts

Hi jonas,

can you please help in below issue.

I have implemented search functionality , in that i have implemented such a way so that when user select tag and click on search button they can able to see all document which all document associated with that tag but its not working for the Guest user.can any one help me out what needs to do for this.

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