Question

I have Menu item “List All Categories”. Problem, that categories do not count articles from sub-categories and shows 0, should count all articles from all subcategories.
I can not add picture, so I will describe:
Category (0)
subcategory1 (1)
subacategory2 (1)

I want, that Category will count articles from sub-categories (in example should be 2).

Is anybody knows, how to fix it?

Any help is very appreciated.

Thank you in advance.
EDIT:

I am using 2.5 Joomla. No, I do not writing component/plugin/module.
I am using menu item:List All Categories (Menus->Main Menu-> Add new menu item-> List All Categories).
At last, I found place, where this function is described.
here, numitems is digit of articles in categories:

 $subQuery = ' (SELECT cat.id as id FROM #__categories AS cat JOIN #__categories AS parent ' .
        'ON cat.lft BETWEEN parent.lft AND parent.rgt WHERE parent.extension = ' . $db->quote($extension) .
        ' AND parent.published != 1 GROUP BY cat.id) ';
    $query->leftJoin($subQuery . 'AS badcats ON badcats.id = c.id');
    $query->where('badcats.id is null');

    // i for item
    if (isset($this->_options['countItems']) && $this->_options['countItems'] == 1)
    {
        if ($this->_options['published'] == 1)
        {
            $query->leftJoin(
                $db->quoteName($this->_table) . ' AS i ON i.' . $db->quoteName($this->_field) . ' = c.id AND i.' . $this->_statefield . ' = 1'
            );
        }
        else
        {
            $query->leftJoin($db->quoteName($this->_table) . ' AS i ON i.' . $db->quoteName($this->_field) . ' = c.id');
        }

        $query->select('COUNT(i.' . $db->quoteName($this->_key) . ') AS numitems');
    }

and from my understanding, there I need to create similar to $subQuery, but this time it should count articles from sub-categories. but I have no idea, how to do that ;/
Any ideas?

Answer 1

Joomla!’s List All Categories will only show the count for articles in that specific category a sub-category will not be counted in a parent category. This is because a parent category can have articles of it’s own.

To show a total for all articles within a Category and it’s sub-categories would require either modifying the Joomla core com_content component (any modification of core files should be considered bad) or creating a modified *copy com_content component* (which would be more efficient but probably more effort than you want) or creating a view override for the categories view.

Using the override will make the page display much heavier computation wise.

If you use an override all you will have to do is:

1. copy default_items.php from /components/com_content/views/categories/tmpl/default_items.php to /templates/your-template/html/com_content/categories/default_items.php and
2. modify it to count the sub-items
3. modify it to display the total count

2 – Count Sub-items

Insert this code after the defined('_JEXEC') or die; line:

// Calculate number of items including sub-categories using a recursive anonymous function
$countSubItems = function( $item ) use ( &$countSubItems ) {
    $children = $item->getChildren();
    if( count($children) == 0 ) {
        return $item->numitems;
    } else {
        $subItems = 0;
        foreach ($children as $child) {
            $subItems += $countSubItems($child);
        }
        return $subItems = $item->numitems + $subItems;
    }
};

Call the count function

Insert the line to call the count function after the second if statement:

$allItemsInclSubCats = $countSubItems($item);

Display the total including sub-categories

Change the line that echo’s the $item->numitems; to something like this:

<dd><?php echo $item->numitems; ?> ( <?php echo $allItemsInclSubCats; ?> including sub-categories )</dd>