データベース値のペアリングについてサポートが必要

わかりました、動作しました。それが最もエレガントな解決策かどうかはわかりません。誰かが改善を呼びかけたいのなら、私はすべての耳です。うまくいけば、これは将来同様の問題を抱えている人に役立つでしょう。

私の最後のアイテム/製品ループクエリ：

    // Get all Items associated with this category page

    // ID of current  category

    $current_cat = $this->category->id;

    // Product IDs array

    $product_ids_array = array();

    $db = JFactory::getDbo();

    $query = $db->getQuery( true );

    $query->select($db->quoteName(array('id' )));

    $query->from( $db->quoteName( '#__k2_items' ) );

    $query->where( $db->quoteName( 'catid' )." = " .$current_cat . ' AND published = 1' );

    $db->setQuery( $query );

    $row = $db->loadObjectList();

    // Store Titles, Descriptions and IDs in arrays

    foreach ($row as $value)
    {
        $product_ids_array[] = $value->id;

    };

    // Now we're going to get the IDs of the tags associated with the items

    // Create comma seperated list of product ids

    $product_ids = implode(',', $product_ids_array);

    // Tag IDs Array

    $tag_IDs_array = array();

    $db = JFactory::getDbo();

    $query = $db->getQuery( true );

    $query->select($db->quoteName(array( 'tagID', 'itemID' )));

    $query->from( $db->quoteName( '#__k2_tags_xref' ) );

    $query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )'  );

    $db->setQuery( $query );

    $row = $db->loadObjectList();

    $tagsRow = $db->loadObjectList();

    $tagsResult = array();

    $tagsResult = json_decode(json_encode($tagsRow),true);

    // Store tag IDs and item IDs

    foreach ($row as $value)
    {
        $tag_IDs_array[] = $value->tagID;     
    };

    // Now we're going to get the names of the tags

    // Create comma seperated list of tag ids

    $tag_IDs = implode(',', $tag_IDs_array );

    // Tag Names Array

    $tag_names_array = array();

    $db = JFactory::getDbo();

    $query = $db->getQuery( true );

    $query->select($db->quoteName(array( 'name' )));

    $query->from( $db->quoteName( '#__k2_tags' ) );

    $query->where($db->quoteName('id') . ' IN (' . $tag_IDs . ' )'  );

    $db->setQuery( $query );

    $row = $db->loadObjectList();

    // Store tag names

    foreach ($row as $value)
    {

        $tag_names_array[] = $value->name;

    };

    // Now we're going to get the attachments

    // Attachments Arrays

    $db = JFactory::getDbo();

    $query = $db->getQuery( true );

    $query->select($db->quoteName(array( 'id', 'itemID', 'filename', 'title', 'titleAttribute' )));

    $query->from( $db->quoteName( '#__k2_attachments' ) );

    $query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )'  );

    $db->setQuery( $query );

    $attachmentRow = $db->loadObjectList();

    $attachmentResult = array();

    $attachmentResult = json_decode(json_encode($attachmentRow),true); 

    // Function to search multidimensional arrays
    function search($array, $key, $value)
    {
        $results = array();

        if (is_array($array)) {
            if (isset($array[$key]) && $array[$key] == $value) {
                $results[] = $array;
            }

            foreach ($array as $subarray) {
                $results = array_merge($results, search($subarray, $key, $value));
            }
        }

        return $results;
    }


    // Now we're going to create our product loop


    // Get Tag Names

    foreach( $tag_names_array as $display_tag_name ) {

        // Unformatted Tag Name - this is the one that will be displayed on the front end

        $unformatted_display_tag_name = $display_tag_name;

        // Convert Tag Name White Spaces to Dashes

        $display_tag_name = preg_replace("/[\s_]/", "-", $display_tag_name);

        // Lower Case Tag Name

        $display_tag_name = strtolower($display_tag_name);

        switch ( $display_tag_name == $display_tag_name ) {

            case $display_tag_name: 

            $db = JFactory::getDbo();

            $query = $db->getQuery( true );

            $query->select($db->quoteName(array( 'title', 'introtext', 'id' )));

            $query->from( $db->quoteName( '#__k2_items' ) );

            $query->where($db->quoteName('alias') . ' LIKE '. $db->quote($display_tag_name.'-%') . ' AND ' . $db->quoteName('catid'). ' = ' . $current_cat . ' AND published = 1'  );

            $db->setQuery( $query );

            $row = $db->loadObjectList();

            // Start Row

            echo '<div class="row">';

            // Start 12 Column

            echo '<div class="col-lg-12">';

            // Start Row

            echo '<div class="row">';

            // Start Item Container

            echo '<section class="item-container">';

            // Display Tag Name 

            echo '<div class="col-lg-12"><section class="tag-name"><a href="#">' . $unformatted_display_tag_name . '</a></section></div>';


            foreach ($row as $value) {

                // Start Column 6

                echo '<div class="col-lg-6 is-hidden">';

                // Store ID of item

                $itemID = $value->id;

                // Search attachmentResult array

                $attachment_search_result = (search($attachmentResult, 'itemID', $itemID));

                // Check to see if there are any associated attachments - display attachment is present

                if($attachment_search_result) {

                    $db = JFactory::getDbo();

                    $query = $db->getQuery( true );

                    $query->select($db->quoteName(array( 'filename' )));

                    $query->from( $db->quoteName( '#__k2_attachments' ) );

                    $query->where( $db->quoteName( 'itemID' )." = " .$itemID );

                    $db->setQuery( $query );

                    $attachmentRow = $db->loadObjectList();

                     foreach ($attachmentRow as $attachmentValue) {

                         echo $attachmentValue->filename . '<br/>';

                     }

                }

                // Display Item Title

                echo '<h5>' .$value->title. '</h5>';

                // Display Item Text

                echo '<p>' .$value->introtext. '</p>';

                // End Column 6

                echo '</div>';

            }

            // Close Item Container

            echo '</section>';

            // Close Row

            echo '</div>';

            // Close 12 Column

            echo '</div>';

            // Close Row

            echo '</div>';

        }

    }

?>
<!-- /Display Category Items -->