Iterating relation_list

Thursday 06 September 2007 5:25:57 am

Hi all,

I have a node of a class which has an attribute of type Object Relations. Now I want to make a <i>foreach</i>-loop iterating through those relations.

I tried this (simplified):

{foreach $node.data_map.images...relation_list as $image}
   {$image.name}
{/foreach}

but I get zippo (which would be nice if I were a serialsmoker).

I should know how to do this, but my head is working at half the speed of a C64, so I just can't remember.

Felix

Publlic Relations Manager
Greater Stavanger
www.greaterstavanger.com

Thursday 06 September 2007 3:09:57 pm

Also remember to see if the node_id is set on the object you fetch, that way you can filter out objects that are placed in the trash..

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Thursday 06 September 2007 5:29:12 pm

Here is a code snippit for those playing at home...

{foreach $node_content.data_map.rl_attribute.content.relation_list as $details}
   {def $rlt_node=fetch('content','node',hash('node_id',$details.node_id))}
   {if $rl_node}{node_view_gui view=line content_node=$rl_node}{/if}
   {undef $rl_node}
{/foreach}

my head is working at half the speed of a C64

You mean a VIC20 ;) ...ahh memories

Cheers
Bruce

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Friday 07 September 2007 10:58:34 am

That’s quite easy to fix, write a small template operator that takes care of the fetching by fetching all objects at once.

In the api you can fetch several nodes at once using:

eZContentObjectTreeNode:fetch

Or several objects at once using:

eZContentObject::fetchIDArray

The first one will skip trashed objects, and the last one will have main_node_id set to NULL if I remember correctly.

If you for some reason have waste amounts of relations, you should also let the operator handle paging.

{def $objects = multi_object_fetch( $node.data_map.rl_attribute.content.relation_list[, $offset = 0[, $limit = 10 ] ]  )}

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