How to pass object from HstComponent to Freemarker templates?

[Eric Nguyen personal]

I have a document type Sports.

Sports document type has a compound field link which links to an image folder.

CMS Console configuration:

component

/hst:hst/hst:configurations/myproject/hst:pages/sportspage/main
  + gallery [hst:component]
    - hst:componentclassname = com.gec.components.GalleryComponent
    - hst:template = gallery

template:

/hst:hst/hst:configurations/myproject/hst:templates
  + gallery [hst:template]
    - hst:renderpath = freemarker/myproject/gallery.ftl

In this examples, I have a GalleryComponent backing a gallery template.

In the GalleryComponent, I'm already to retrieve the images.

I've use to try pass the result object (which is a list of HippoGalleryImageSet objects) to the template, but I'm getting error.

----------

 

[INFO] [talledLocalContainer] ==> ${result.count} [on line 5, column 4 in WEB-INF/freemarker/scc/gallery.ftl]

[INFO] [talledLocalContainer] ----------

[INFO] [talledLocalContainer]  

[INFO] [talledLocalContainer] Java backtrace for programmers:

[INFO] [talledLocalContainer] ----------

[INFO] [talledLocalContainer] freemarker.template.TemplateException: Expected hash. result evaluated instead to freemarker.template.SimpleSequence on line 5, column 6 in WEB-INF/freemarker/scc/gallery.ftl.

[INFO] [talledLocalContainer] at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:135)

For testing, I tried to access one of the  HippoGalleryImageSet in the ftl template and I can!

(see below)

What am I missing?

GalleryComponent.java

@ParametersInfo(type = EssentialsDocumentListComponentInfo.class)
public class GalleryComponent extends EssentialsListComponent {@Override
 public void doBeforeRender(final HstRequest request,
 final HstResponse response)
 throws HstComponentException {
 l.info("doBeforeRender");
 
 HippoDocumentBean subject = request.getRequestContext().getContentBean(HippoDocumentBean.class);
 Sports sports = (Sports) subject;
 HippoFolderBean sportsGallery = (HippoFolderBean) sports.getGallery();
 
 List<HippoGalleryImageSet> images = sportsGallery.getDocuments(HippoGalleryImageSet.class);
 for (HippoGalleryImageSet image: images) {
 l.info("Image is "+image.getFileName());
 }
 request.setAttribute("result", images);
 request.setAttribute("document", images.get(0));
 }
}

gallery.ftl

<#include "/WEB-INF/freemarker/include/imports.ftl">
<h5>gallery</h5>
${document} <!-- this object is printed out: org.hippoecm.hst.content.beans.standard.HippoGalleryImageSet@f418cf9d --><#if result??>
<p>${result.count}</p>
</#if>
<ul id="images">
<#list result.items as item>
 <@hst.link var="img" hippobean=item/>
 <li>
 <img src="${img}" alt="${item.fileName}" />
 </li>
</#list>
</ul>

[Tobias Jeger]

Hi Eric,

it appears that "result" is of type List<>, so your FTL check should probably look at the "size" of the list, not the "count"?

cheers

Tobi

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[Eric Nguyen personal]

Thanks but I've tried, neither result.size or result.size() works.

Regarding the loop, I made a mistake.

I changed <code><#list result.items as item></code> to <code><#list result as item></code> and the loop works.

[Woonsan Ko]

You should use the size built-in like this:

${result?size}

ref) http://freemarker.org/docs/ref_builtins_sequence.html#ref_builtin_size

> In this examples, I have a *GalleryComponent* backing a gallery
> template.
> In the *GalleryComponent*, I'm already to retrieve the images.

> I've use to try pass the result object (which is a list of

> *HippoGalleryImageSet* objects) to the template, but I'm getting

> error.
> |
> ----------
>
>
>
> [INFO][talledLocalContainer]==>${result.count}[on line 5,column
> 4inWEB-INF/freemarker/scc/gallery.ftl]
>
> [INFO][talledLocalContainer]----------
>
> [INFO][talledLocalContainer]
>
> [INFO][talledLocalContainer]Javabacktrace forprogrammers:
>
> [INFO][talledLocalContainer]----------
>
> [INFO][talledLocalContainer]freemarker.template.TemplateException:Expectedhash.result
> evaluated instead to freemarker.template.SimpleSequenceon line
> 5,column 6inWEB-INF/freemarker/scc/gallery.ftl.
>
> [INFO][talledLocalContainer]at
> freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:135)
> |
>
>
> For testing, I tried to access one of the HippoGalleryImageSet
> in the ftl template and I can!
>
> (see below)
>
> What am I missing?
>
>

> *GalleryComponent.java*
> |
> @ParametersInfo(type =EssentialsDocumentListComponentInfo.class)
> publicclassGalleryComponentextendsEssentialsListComponent{@Override
> publicvoiddoBeforeRender(finalHstRequestrequest,
> finalHstResponseresponse)
> throwsHstComponentException{
> l.info("doBeforeRender");
>
> HippoDocumentBeansubject
> =request.getRequestContext().getContentBean(HippoDocumentBean.class);
> Sportssports =(Sports)subject;
> HippoFolderBeansportsGallery =(HippoFolderBean)sports.getGallery();
>
> List<HippoGalleryImageSet>images
> =sportsGallery.getDocuments(HippoGalleryImageSet.class);
> for(HippoGalleryImageSetimage:images){

> l.info("Image is "+image.getFileName());
> }
> request.setAttribute("result",images);
> request.setAttribute("document",images.get(0));
> }
> }
>
> |
>
>

> *gallery.ftl*

> |
> <#include "/WEB-INF/freemarker/include/imports.ftl">
> <h5>gallery</h5>
> ${document} <!-- this object is printed out:
> org.hippoecm.hst.content.beans.standard.HippoGalleryImageSet@f418cf9d
> --><#if result??>
> <p>${result.count}</p>
> </#if>

> <ulid="images">

> <#list result.items as item>
> <@hst.link var="img" hippobean=item/>
> <li>

> <imgsrc="${img}"alt="${item.fileName}"/>

> </li>
> </#list>
> </ul>
> |
>
>
>
>
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> announcements about Hippo CMS (and HST, repository etc. etc.)
>
> To post to this group, send email to hippo-c...@googlegroups.com

> <javascript:>
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>
>
>
>
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> Boston - 101 Main Street, Cambridge, MA 02142
>
> US +1 877 414 4776 (toll free)
> Europe +31(0)20 522 4466

> www.onehippo.com <http://www.onehippo.com/>

>
> --
> Hippo Community Group: The place for all discussions and announcements
> about Hippo CMS (and HST, repository etc. etc.)
>
> To post to this group, send email to hippo-c...@googlegroups.com
> RSS:
> https://groups.google.com/group/hippo-community/feed/rss_v2_0_msgs.xml?num=50
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