Prestashop - Add additional fields on product combination - prestashop

Question

I'm trying to add additional fields on my product combinations in order to have custom meta titles for the combinations.
So I created this module:
My module definition:
class CombinationCustomFields extends Module
{
public function __construct()
{
$this->name = 'combinationcustomfields';
$this->tab = 'administration';
$this->author = '';
$this->version = '1.0';
$this->need_instance = 0;
$this->bootstrap = true;
parent::__construct();
$this->displayName = $this->l('Combination Custom Fields');
$this->description = $this->l('Add additional fields on combinations');
$this->ps_versions_compliancy = array('min' => '1.7.1', 'max' => _PS_VERSION_);
}
public function install()
{
if (!parent::install() || !$this->_installSql()
|| !$this->registerHook('displayAdminProductsCombinationBottom')
|| !$this->registerHook('actionAttributeCombinationSave')
) {
return false;
}
return true;
}
public function uninstall()
{
return parent::uninstall() && $this->_unInstallSql();
}
/**
* Add database fields
* #return boolean
*/
protected function _installSql()
{
$sqlInstall = "ALTER TABLE " . _DB_PREFIX_ . "product_attribute "
. "ADD meta_title_fr VARCHAR(255) NULL, "
. "ADD meta_title_en VARCHAR(255) NULL;";
$returnSql = Db::getInstance()->execute($sqlInstall);
return $returnSql;
}
/**
* Remove database fields
* #return boolean
*/
protected function _unInstallSql()
{
$sqlInstall = "ALTER TABLE " . _DB_PREFIX_ . "product_attribute "
. "DROP meta_title_fr, "
. "DROP meta_title_en";
$returnSql = Db::getInstance()->execute($sqlInstall);
return $returnSql;
}
public function hookDisplayAdminProductsCombinationBottom($params)
{
$combination = new Combination($params['id_product_attribute']);
$this->context->smarty->assign(array(
'id_product_attribute' => $params['id_product_attribute'],
'meta_title_fr' => $combination->meta_title_fr,
'meta_title_en' => $combination->meta_title_en,
)
);
return $this->display(__FILE__, 'views/templates/hook/combinationfields.tpl');
}
public function hookActionAttributeCombinationSave($params)
{
$combination = new Combination($params['id_product_attribute']);
$this->context->smarty->assign(array(
'id_product_attribute' => $params['id_product_attribute'],
'meta_title_fr' => $combination->meta_title_fr,
'meta_title_en' => $combination->meta_title_en,
)
);
$combination->meta_title_fr = Tools::getValue('meta_title_fr');
$combination->meta_title_en = Tools::getValue('meta_title_en');
$combination->save();
return $this->display(__FILE__, 'views/templates/hook/combinationfields.tpl');
}
}
My HTML for the admin hook:
<div class="m-b-1 m-t-1">
<h2>{l s='Combination Custom Fields' mod='combinationcustomfields'}</h2>
<fieldset class="form-group">
<div class="col-lg-12 col-xl-4">
<label class="form-control-label" for="combination_{$id_product_attribute}_attribute_meta_title_fr">{l s='Meta title FR' mod='combinationcustomfields'}</label>
<input class="form-control" name="combination_{$id_product_attribute}[attribute_meta_title_fr]" id="combination_{$id_product_attribute}_attribute_meta_title_fr" type="text" value="{if $meta_title_fr != ''}{$meta_title_fr}{/if}">
<br />
</div>
<div class="col-lg-12 col-xl-4">
<label class="form-control-label" for="combination_{$id_product_attribute}_attribute_meta_title_en">{l s='Meta title EN' mod='cmp_combination_customfields'}</label>
<input class="form-control" name="combination_{$id_product_attribute}[attribute_meta_title_en]" id="combination_{$id_product_attribute}_attribute_meta_title_en" type="text" value="{if $meta_title_en != ''}{$meta_title_en}{/if}">
<br />
</div>
</fieldset>
<div class="clearfix"></div>
</div>
My override of the combination class:
class Combination extends CombinationCore
{
public $meta_title_fr;
public $meta_title_en;
/**
* #see ObjectModel::$definition
*/
public static $definition = [
'table' => 'product_attribute',
'primary' => 'id_product_attribute',
'fields' => [
'id_product' => ['type' => self::TYPE_INT, 'shop' => 'both', 'validate' => 'isUnsignedId', 'required' => true],
'location' => ['type' => self::TYPE_STRING, 'validate' => 'isGenericName', 'size' => 64],
'ean13' => ['type' => self::TYPE_STRING, 'validate' => 'isEan13', 'size' => 13],
'isbn' => ['type' => self::TYPE_STRING, 'validate' => 'isIsbn', 'size' => 32],
'upc' => ['type' => self::TYPE_STRING, 'validate' => 'isUpc', 'size' => 12],
'mpn' => ['type' => self::TYPE_STRING, 'validate' => 'isMpn', 'size' => 40],
'quantity' => ['type' => self::TYPE_INT, 'validate' => 'isInt', 'size' => 10],
'reference' => ['type' => self::TYPE_STRING, 'size' => 64],
'supplier_reference' => ['type' => self::TYPE_STRING, 'size' => 64],
'meta_title_fr' => ['type' => self::TYPE_STRING, 'size' => 64],
'meta_title_en' => ['type' => self::TYPE_STRING, 'size' => 64],
/* Shop fields */
'wholesale_price' => ['type' => self::TYPE_FLOAT, 'shop' => true, 'validate' => 'isPrice', 'size' => 27],
'price' => ['type' => self::TYPE_FLOAT, 'shop' => true, 'validate' => 'isNegativePrice', 'size' => 20],
'ecotax' => ['type' => self::TYPE_FLOAT, 'shop' => true, 'validate' => 'isPrice', 'size' => 20],
'weight' => ['type' => self::TYPE_FLOAT, 'shop' => true, 'validate' => 'isFloat'],
'unit_price_impact' => ['type' => self::TYPE_FLOAT, 'shop' => true, 'validate' => 'isNegativePrice', 'size' => 20],
'minimal_quantity' => ['type' => self::TYPE_INT, 'shop' => true, 'validate' => 'isUnsignedId', 'required' => true],
'low_stock_threshold' => ['type' => self::TYPE_INT, 'shop' => true, 'allow_null' => true, 'validate' => 'isInt'],
'low_stock_alert' => ['type' => self::TYPE_BOOL, 'shop' => true, 'validate' => 'isBool'],
'default_on' => ['type' => self::TYPE_BOOL, 'allow_null' => true, 'shop' => true, 'validate' => 'isBool'],
'available_date' => ['type' => self::TYPE_DATE, 'shop' => true, 'validate' => 'isDateFormat'],
],
];
}
But when I save the product, the fields are in the request:
But I have a 400 Error:
Any idea of my mistake here ?
All the best and thanks in advance for you help :)

Answer 1

You can override the combination class using an override controler:
class Combination extends CombinationCore
{
public $newVariableName;
public function __construct($id = null, $id_lang = null, $id_shop = null)
{
Combination::$definition['fields']['newVariableName'] = array('type' => self::TYPE_STRING, 'validate' => 'isAnything', 'required' => false);
parent::__construct($id, $id_lang, $id_shop);
}
}
You will also need to override product.php
public function updateProductAttribute($id_product_attribute, ..., $newVariableName = null){
public function addCombinationEntity($wholesale_price, ..., $newVariableName = null){
and so on...

Answer 2

I would do so:
HTML:
Change all attributes combination_ to custom_
<div class="m-b-1 m-t-1">
<h2>{l s='Combination Custom Fields' mod='combinationcustomfields'}</h2>
<fieldset class="form-group">
<div class="col-lg-12 col-xl-4">
<label class="form-control-label" for="custom_{$id_product_attribute}_attribute_meta_title_fr">{l s='Meta title FR' mod='combinationcustomfields'}</label>
<input class="form-control" name="custom_{$id_product_attribute}[attribute_meta_title_fr]" id="custom_{$id_product_attribute}_attribute_meta_title_fr" type="text" value="{if $meta_title_fr != ''}{$meta_title_fr}{/if}">
<br />
</div>
<div class="col-lg-12 col-xl-4">
<label class="form-control-label" for="custom_{$id_product_attribute}_attribute_meta_title_en">{l s='Meta title EN' mod='cmp_combination_customfields'}</label>
<input class="form-control" name="custom_{$id_product_attribute}[attribute_meta_title_en]" id="custom_{$id_product_attribute}_attribute_meta_title_en" type="text" value="{if $meta_title_en != ''}{$meta_title_en}{/if}">
<br />
</div>
</fieldset>
<div class="clearfix"></div>
Next step:
public function hookActionAttributeCombinationSave($params)
{
$id_product_attribute = $params['id_product_attribute'];
$custom = $_POST['custom_' . $id_product_attribute];
....
}