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Johan Svensson
Get the articles categories, using Velocity and article templates?
October 6, 2011 5:08 AM
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Johan Svensson

Rank: New Member

Posts: 1

Join Date: October 6, 2011

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Hi!

I have the following issue. I need to get an articles categories, that has been set when the article was created.
I have already obtained the articles unique ID using $reserved-article-id.data but I cant find the Velocity code that gets the articles categories.

I want the article template to work like this:
1. I get the articles different elements, from the structure, by using "xxx.getData() etc.
3. (ISSUE) I want the article template to not only get the ID of the article, but also the categories.
2. By using JavaScript I hide and show different textfields and images depending on the articles categorization.

So, any suggestions??
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Sandeep Nair
RE: Get the articles categories, using Velocity and article templates?
October 6, 2011 9:38 PM
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Sandeep Nair

Rank: Liferay Legend

Posts: 1671

Join Date: November 5, 2008

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Hi,

You can user serviceLocator's findService method to find appropriate service(in your case i believe AssetCategory) and then use its API method to get the categories that you are interested in.

http://www.liferay.com/community/wiki/-/wiki/Main/Access+to+Liferay+services+in+Velocity

Regards,
Sandeep
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Ravi Kumar Gupta
RE: Get the articles categories, using Velocity and article templates?
October 7, 2011 1:08 AM
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Ravi Kumar Gupta

Rank: Liferay Legend

Posts: 1041

Join Date: June 23, 2009

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refer this post for java code to get the categories.. use that after locating the service as Sandeep suggested.
http://www.liferay.com/community/forums/-/message_boards/message/10984882
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Paul Butenko
RE: Get the articles categories, using Velocity and article templates?
May 25, 2012 5:23 AM
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Paul Butenko

Rank: Junior Member

Posts: 38

Join Date: July 1, 2010

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Hi,
Here is the code wich can help:

#set($journalLocalService = $serviceLocator.findService("com.liferay.portlet.journal.service.JournalArticleLocalService"))
#set($scopeId = $request.theme-display.scope-group-id)

## get article's primaryKey
## NOTE: be careful about input parameters types should match
#set($articlePrimKey = $journalLocalService.getArticle($getterUtil.getLong($scopeId), $reserved-article-id.data).resourcePrimKey)

#set($catLocalService = $serviceLocator.findService("com.liferay.portlet.asset.service.AssetCategoryLocalService"))

## get article's category names by primaryKey
#set($articleCatNames = $catLocalService.getCategoryNames("com.liferay.portlet.journal.model.JournalArticle", $getterUtil.getLong($articlePrimKey)))

$articleCatNames

Also you can this post.
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Randy Parsons
RE: Get the articles categories, using Velocity and article templates?
October 24, 2012 6:46 AM
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Randy Parsons

Rank: New Member

Posts: 15

Join Date: January 4, 2011

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Hi Paul,
This is exactly what I was looking for but I seem to be getting an error. When I attempt to print out the Categories in my Template, I get the following when using the above code. I reviewed the API for the AssetCategoryLocalService and everything looks right. I have confirmed that I do get values for $articlePrimKey and $scopeId.

Also, every time I refresh the page, I get a different value returned.

Article Categories: [Ljava.lang.String;@4b17e6c4

I'm using Liferay 6.1.2. Any ideas.
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John Carter
RE: Get the articles categories, using Velocity and article templates?
October 25, 2012 5:23 AM
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John Carter

Rank: Junior Member

Posts: 39

Join Date: October 18, 2012

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Randy Parsons:
Hi Paul,
This is exactly what I was looking for but I seem to be getting an error. When I attempt to print out the Categories in my Template, I get the following when using the above code. I reviewed the API for the AssetCategoryLocalService and everything looks right. I have confirmed that I do get values for $articlePrimKey and $scopeId.

Also, every time I refresh the page, I get a different value returned.

Article Categories: [Ljava.lang.String;@4b17e6c4

I'm using Liferay 6.1.2. Any ideas.



Randy,
If problem still exsits then check the below code to get categories name ,as you are getting the string array of CategoryName
1
2#foreach($catName in $articleCatNames)
3$catName
4#end
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Randy Parsons
RE: Get the articles categories, using Velocity and article templates?
October 26, 2012 5:49 AM
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Randy Parsons

Rank: New Member

Posts: 15

Join Date: January 4, 2011

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John,

Thank you for the quick reply. This solved the 'displaying' of the categories.

For anyone else looking for the solution, here is the complete code.

 1#set($journalLocalService = $serviceLocator.findService("com.liferay.portlet.journal.service.JournalArticleLocalService"))
 2#set($scopeId = $request.theme-display.scope-group-id)
 3
 4## get article's primaryKey
 5## NOTE: be careful about input parameters types should match
 6#set($articlePrimKey = $journalLocalService.getArticle($getterUtil.getLong($scopeId), $reserved-article-id.data).resourcePrimKey)
 7
 8#set($catLocalService = $serviceLocator.findService("com.liferay.portlet.asset.service.AssetCategoryLocalService"))
 9
10## get article's category names by primaryKey
11#set($articleCatNames = $catLocalService.getCategoryNames("com.liferay.portlet.journal.model.JournalArticle", $getterUtil.getLong($articlePrimKey)))
12
13<div>Article Categories:
14        <span>
15            #foreach ($catName in $articleCatNames)
16                $catName
17            #end
18        </span>
19    </div>



Curious Question:
What is the difference between $articlePrimKey used above and the value returned with the velocity reserved $reserved-article-id.data? Both return different values.
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Gaurav Jain
RE: Get the articles categories, using Velocity and article templates?
October 26, 2012 5:59 AM
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Gaurav Jain

Rank: Regular Member

Posts: 141

Join Date: January 31, 2011

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Randy Parsons:


Curious Question:
What is the difference between $articlePrimKey used above and the value returned with the velocity reserved $reserved-article-id.data? Both return different values.



$articlePrimKey is article's resourcePrimaryKey while $reserved-article-id is article's articleId.
Liferay maintains these two as different attributes on article object. The method you are using in AssetCategoryLocalService to getCategoryNames() requires article's resourcePrimaryKey
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Fernando Tapia
RE: Get the articles categories, using Velocity and article templates?
April 26, 2013 3:58 AM
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Fernando Tapia

Rank: New Member

Posts: 2

Join Date: June 6, 2012

Recent Posts

Hi ,
I was working in the version 6.1 and it did not work, I search a bit and i got it working like this:

 1
 2#set ($tagsService = $portal.getClass().forName("com.liferay.portlet.asset.service.AssetTagServiceUtil").getMethod("getService", null).invoke(null, null))
 3#set ($journalArticleResourceService = $portal.getClass().forName("com.liferay.portlet.journal.service.JournalArticleResourceLocalServiceUtil").getMethod("getService", null).invoke(null, null))
 4#set ($catLocalService = $portal.getClass().forName("com.liferay.portlet.asset.service.AssetCategoryLocalServiceUtil").getMethod("getService", null).invoke(null, null))
 5
 6#set ($longGroupId = $getterUtil.getLong($groupId))
 7
 8#set ($articleResourcePK = $journalArticleResourceService.getArticleResourcePrimKey($longGroupId, $reserved-article-id.data))
 9
10## get article's category names by primaryKey
11#set($articleCatNames = $catLocalService.getCategoryNames("com.liferay.portlet.journal.model.JournalArticle", $articleResourcePK))
12
13<div>Article Categories:  $articleResourcePK
14        <span>
15            #foreach ($catName in $articleCatNames)
16                $catName
17            #end
18        </span>
19    </div>
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