Display articles Tags in Tag View

Question

When you click on a tag inside an article you go to com-tags view-tag, that is created by com_tags/views/tag/tmpl/default_items. This is a blog with articles with the same tag. I want there, inside every article to display also the tags. I have created an override for this view: ../html/com_tags/tag/tag_items.php and added there this code (took it from /components/com_content/views/article/tmpl/default.php)

<?php $this->item->tagLayout = new JLayoutFile('joomla.content.tags'); ?>
<?php echo $this->item->tagLayout->render($this->item->tags->itemTags); ?>

According to Joomla "Sharing layouts across views or extensions with JLayout" documentation I should have my tags there, but obviously I have somewhere an issue as I am receiving an error on the front end.

Call to a member function render() on null

The code is (I can not manage to show it well, but it is the original Joomla /components/com_tags/views/tag/tmpl/default_items.php):

authorise('core.edit', 'com_tags');
$canCreate    = $user->authorise('core.create', 'com_tags');
$canEditState = $user->authorise('core.edit.state', 'com_tags');

JFactory::getDocument()->addScriptDeclaration("
        var resetFilter = function() {
        document.getElementById('filter-search').value = '';
    }
");

?>
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            params->get('filter_field')) : ?>
                
                    
                        
                    
                    escape($this->state->get('list.filter')); ?>" class="inputbox" onchange="document.adminForm.submit();" title="" placeholder="" />
                    " onclick="document.adminForm.submit();" class="btn">
                        
                    
                    " class="btn" onclick="resetFilter(); document.adminForm.submit();">
                        
                    
                
            
            params->get('show_pagination_limit')) : ?>
                
                    
                        
                    
                    pagination->getLimitBox(); ?>
                
            
            
            
            
            
            
        
    
    items)) : ?>
        

    
        
            items as $i => $item) : ?>
                core_state == 0) : ?>
                    ">
                
                     clearfix">
                
                type_alias === 'com_users.category') || ($item->type_alias === 'com_banners.category')) : ?>
                    

                        escape($item->core_title); ?>
                    
                
                    

                        link); ?>">
                            escape($item->core_title); ?>
                        
                    
                
                
                event->afterDisplayTitle; ?>
                core_images); ?>
                params->get('tag_list_show_item_image', 1) == 1 && !empty($images->image_intro)) : ?>
                    link); ?>">
                        image_intro); ?>" alt="image_intro_alt); ?>">
                    
                
                params->get('tag_list_show_item_description', 1)) : ?>
                    
                    event->beforeDisplayContent; ?>
                    
                        core_body, $this->params->get('tag_list_item_maximum_characters')); ?>
                    
                    
                    event->afterDisplayContent; ?>
                
                
            
        
    

Answer 1

The problem is that you haven't captured the tags associated with the article. The tags aren't held in the same table as the article data, so they need special code in order to be included. If you look in the /components/com_content/views/article/view.html.php file you'll see

$item->tags = new JHelperTags;
$item->tags->getItemTags('com_content.article', $item->id);

This sets up the itemTags property in the JHelperTags object, and so can be referenced by $item->tags->itemTags. This is what you'll have to do in your layout file.

Also in the tags default_items.php file $this doesn't refer to the same thing as the $this in the com_content default.php file. In the tags layout file each item is referenced using $item so you'll have to use it instead of $this->item.

So for example in the default_items.php override you can put just under the line:

<?php foreach ($this->items as $i => $item) : ?>

the following code to output the other tags of articles:

<?php 
    if ($item->type_alias === 'com_content.article')
    {
        $item->tags = new JHelperTags;
        $item->tags->getItemTags('com_content.article', $item->id);
        $item->tagLayout = new JLayoutFile('joomla.content.tags'); 
        echo $item->tagLayout->render($item->tags->itemTags); 
    }
?>