Problem:
retrieve only specific contents of a Plone folder, order the list by a customised criteria (i.e. date, title) and display some of their related info.
case-study:
I have a letter with related images ( a customised product that I created, called “BevanLetterImage”) in one folder. I want to display the images below the letter and order them by title.
Solution:
create a list which displays from the folder contents only the images and specify the title as the sortable criteria.
Implementation:
Insert the following code in the part of the template where you want the list to show.
The code retrieves only the object of type aType and according to criteria sortable_criteria (examples of criteria: ‘sortable_title’, ‘Date’).
For each image it displays the title and the image as a thumbnail. Both are also rendered as links to the real image.
<!--image list-->
<div id="photo-holder">
<tal:foldercontents define="contentFilter contentFilter|request/contentFilter|nothing;
limit_display limit_display|request/limit_display|nothing;
more_url more_url|request/more_url|string:folder_contents;
contentsMethod python:test(here.portal_type=='Topic', here.queryCatalog, here.getFolderContents);
folderContents folderContents|python:contentsMethod(contentFilter={'sort_on':'sortable_criteria','portal_type':['aType']}, batch=True);
use_view_action site_properties/typesUseViewActionInListings|python:();
over_limit python: limit_display and len(folderContents) > limit_display;
folderContents python: (over_limit and folderContents[:limit_display]) or folderContents;
batch folderContents">
<h3>Photos of the original letter (<span tal:content="python:len(folderContents)"></span> in total)</h3>
<tal:listing condition="folderContents">
<tal:block tal:repeat="item folderContents">
<div tal:define="item_url item/getURL|item/absolute_url;
item_id item/getId|item/id;
item_title_or_id item/pretty_title_or_id;
item_description item/Description;
item_type item/portal_type;
item_type_title item/Type;">
<!-- custom -->
<a href="#"
tal:attributes="href python:item_url+'/view'"><p class="photo-title" tal:content="item_title_or_id"></p>
<img src="" alt="" tal:attributes="src python:item_url+'/image_thumb'" />
</a>
<!-- end of custom -->
</div>
</tal:block>
</tal:listing>
</tal:foldercontents>
</div> <div style="clear:both"></div>
<!--end of image list-->
