New Zenner
- Join Date:
- Oct 2008
- Posts:
- 36
- Plugin Contributions:
- 0
How To Add New Product Fields?
After searching through the Zen Cart forums for help on how to add new product fields, I came across a thread started by crazy_chris which shows how to add a new field to the existing products table. Later in that thread zskiman shows how to add fields into a separate table, which is a great idea to future proof your efforts for later upgrades etc. My intention here is to share what I have learned from both these posts and add my own input which I think simplifies the end usage of your new fields.
Any changes to existing code or completely new code are shown in red (what out for , too).
So lets gets started...
- Create a new table to hold your additional fields and give it a name i.e. products_extra_stuff and add the products_id field (so we can relate our new table to the existing products table) and whatever fields you wish to add i.e. **products_colour
**
2. Open includes/database_tables.php and add your new table to the list of definitions i.e.define('TABLE_PRODUCTS_EXTRA_STUFF', DB_PREFIX . 'products_extra_stuff');
3. Open admin/includes/modules/product/preview_info.php and change the following lines:
(line 26 for me)
p.products_sort_order, pdex.products_colour
from " . TABLE_PRODUCTS . " p, " . TABLE_PRODUCTS_DESCRIPTION . " pd, " . TABLE_PRODUCTS_EXTRA_STUFF . " pdex
where p.products_id = pd.products_id and p.products_id = pdex.products_id
4. Open admin/includes/modules/product/collect_info.php and change the following lines :
(line 12 for me)
$parameters = array('products_name' => '',
'products_description' => '',
…
'master_categories_id' => '',
'products_colour' => ''
);
(now line 60 for me after the above edit)
p.products_price_sorter, p.master_categories_id, pdex.products_colour
from " . TABLE_PRODUCTS . " p, " . TABLE_PRODUCTS_DESCRIPTION . " pd, " .
TABLE_PRODUCTS_EXTRA_STUFF . " pdex
where p.products_id = '" . (int)$_GET['pID'] . "'
and p.products_id = pd.products_id and p.products_id = pdex.products_id
5. In the same file (collect_info.php) insert your form fields to collect your new data along with the rest:
(line 305 for me as I wanted to insert just below product name)
<!-- BOF - Additional field added -->
<tr>
6. Open admin/includes/modules/update_product.php and add the following lines to process both new products and the editing of existing ones:
(line 153 for me)
////////////// MY ADDED FIELDS ////////////////////
$sql_data_array = array('products_colour' => zen_db_prepare_input($_POST['products_colour']));
if ($action == 'insert_product') {
$insert_sql_data = array('products_id' => $products_id);
$sql_data_array = array_merge($sql_data_array, $insert_sql_data);
zen_db_perform(TABLE_PRODUCTS_EXTRA_STUFF, $sql_data_array);
} elseif ($action == 'update_product') {
zen_db_perform(TABLE_PRODUCTS_EXTRA_STUFF, $sql_data_array, 'update', "products_id = '" . (int)$products_id . "'");
}
/////////////////////////////////////////////
7. In order to make the data from your new field(s) available to add to the product page open inludes/modules/pages/product_info/main_template_vars.php and change the following lines:
(line 55 for me)
p.products_discount_type, p.products_discount_type_from, p.products_sort_order,
p.products_price_sorter, pdex.products_colour
from " . TABLE_PRODUCTS . " p, " . TABLE_PRODUCTS_DESCRIPTION . " pd, " . TABLE_PRODUCTS_EXTRA_STUFF . " pdex
where p.products_status = '1'
and p.products_id = '" . (int)$_GET['products_id'] . "'
and pd.products_id = p.products_id and p.products_id = pdex.products_id
(line 101 for me amongst products name, model and description)
$products_colour = $product_info->fields['products_colour'];
8. Finally, to display the data from your new field(s) open includes/templates/YOUR_TEMPLATE/templates/tpl_product_info_display.php and add something similar to the following:
(place wherever you wish your new field to be displayed)
<!--bof Product Colour -->
And that my friends is it...Enjoy!
