How to group products that have the same SKU but differ in color and size?

Question

opencart

Tell me guys, you need to add a product with a different article in color and size as a separate item, and group them by code:
For example: there is a product with the code V-0257, and it has 3 colors and 2 sizes and an article with a code by color and by size is as follows V-0257-01-02.
There is a separate field in the table for the product code V-0257. That is, I need to add each color and size as a separate item, for example:
V-0257-01-01
V-0257-02-01
V-0257-03-01
V-0257-01-02
V-0257-02-02
V-0257-03-02
Please tell me how can I change the following opencart 2.2 code

public function getProducts ($data = array()) {
  $sql = 
  "
  SELECT p.product_id, p.quantity>0 as instock, 
    (
      SELECT AVG(rating) AS total FROM " . DB_PREFIX . "review r1 
      WHERE r1.product_id = p.product_id 
        AND r1.status = '1' 
        GROUP BY r1.product_id
    ) AS rating,
    
    (
      SELECT price FROM " . DB_PREFIX . "product_discount pd2 
      WHERE pd2.product_id = p.product_id 
        AND pd2.customer_group_id = '" . (int)$this->config->get('config_customer_group_id') . "' 
        AND pd2.quantity = '1' 
        AND ((pd2.date_start = '0000-00-00' OR pd2.date_start < NOW()) 
        AND (pd2.date_end = '0000-00-00' OR pd2.date_end > NOW())) 
      ORDER BY pd2.priority ASC, pd2.price ASC LIMIT 1
    ) AS discount, 
    
    (
      SELECT price FROM " . DB_PREFIX . "product_special ps 
      WHERE ps.product_id = p.product_id 
        AND ps.customer_group_id = '" . (int)$this->config->get('config_customer_group_id') . "' 
        AND ((ps.date_start = '0000-00-00' OR ps.date_start < NOW()) 
        AND (ps.date_end = '0000-00-00' OR ps.date_end > NOW())) 
      ORDER BY ps.priority ASC, ps.price ASC LIMIT 1
    ) AS special
  
  ";
      
  if (!empty($data['filter_category_id'])) {
    if (!empty($data['filter_sub_category'])) {
      $sql .= " FROM " . DB_PREFIX . "category_path cp LEFT JOIN " . DB_PREFIX . "product_to_category p2c ON (cp.category_id = p2c.category_id)";
    } else {
      $sql .= " FROM " . DB_PREFIX . "product_to_category p2c";
    }

    if (!empty($data['filter_filter'])) {
      $sql .= " LEFT JOIN " . DB_PREFIX . "product_filter pf ON (p2c.product_id = pf.product_id) LEFT JOIN " . DB_PREFIX . "product p ON (pf.product_id = p.product_id)";
    } else {
      $sql .= " LEFT JOIN " . DB_PREFIX . "product p ON (p2c.product_id = p.product_id)";
    }
  } else {
    $sql .= " FROM " . DB_PREFIX . "product p";
  }

  $sql .= " LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.product_id = pd.product_id) LEFT JOIN " . DB_PREFIX . "product_to_store p2s ON (p.product_id = p2s.product_id) WHERE pd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '" . (int)$this->config->get('config_store_id') . "'";

  if (!empty($data['filter_category_id'])) {
    if (!empty($data['filter_sub_category'])) {
      $sql .= " AND cp.path_id = '" . (int)$data['filter_category_id'] . "'";
    } else {
      $sql .= " AND p2c.category_id = '" . (int)$data['filter_category_id'] . "'";
    }

    if (!empty($data['filter_filter'])) {
      $implode = array();

      $filters = explode(',', $data['filter_filter']);

      foreach ($filters as $filter_id) {
        $implode[] = (int)$filter_id;
      }
      
      $sql .= " AND pf.filter_id IN (" . implode(',', $implode) . ")";

    }
  }

  if (!empty($data['filter_name']) || !empty($data['filter_tag'])) {
    $sql .= " AND (";

    if (!empty($data['filter_name'])) {
      $implode = array();

      $words = explode(' ', trim(preg_replace('/\s+/', ' ', $data['filter_name'])));

      foreach ($words as $word) {
        $implode[] = "pd.name LIKE '%" . $this->db->escape($word) . "%'";
      }

      if ($implode) {
        $sql .= " " . implode(" AND ", $implode) . "";
      }

      if (!empty($data['filter_description'])) {
        $sql .= " OR pd.description LIKE '%" . $this->db->escape($data['filter_name']) . "%'";
      }
    }

    if (!empty($data['filter_name']) && !empty($data['filter_tag'])) {
      $sql .= " OR ";
    }

    if (!empty($data['filter_tag'])) {
      $sql .= "pd.tag LIKE '%" . $this->db->escape($data['filter_tag']) . "%'";
    }

    if (!empty($data['filter_name'])) {
      $sql .= " OR LCASE(p.model) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.sku) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.upc) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.ean) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.jan) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.isbn) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
      $sql .= " OR LCASE(p.mpn) = '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "'";
    }

    $sql .= ")";
  }

  if (!empty($data['filter_manufacturer_id'])) {
    $sql .= " AND p.manufacturer_id = '" . (int)$data['filter_manufacturer_id'] . "'";
  }

  $sql .= " GROUP BY p.product_id";

  $sort_data = array(
    'pd.name',
    'p.model',
    'p.quantity',
    'p.price',
    'rating',
    'p.sort_order',
    'p.date_added'
  );

  
  
  
  /****** Сортировка товаров по наличию, если количество товаров = 0, то товар которого нет в наличии уходит в конец списка ******/
  if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
    if ($data['sort'] == 'pd.name' || $data['sort'] == 'p.model') {
      $sql .= " ORDER BY instock DESC, LCASE(" . $data['sort'] . ")";
    } elseif ($data['sort'] == 'p.price') {
      $sql .= " ORDER BY instock DESC (CASE WHEN special IS NOT NULL THEN special WHEN discount IS NOT NULL THEN discount ELSE p.price END)";
    } else {
      $sql .= " ORDER BY instock DESC, " . $data['sort'];
    }
  } else {
    $sql .= " ORDER BY instock DESC, p.sort_order";
  }
  /**********************/
  
  if (isset($data['order']) && ($data['order'] == 'DESC')) {
    $sql .= " DESC, LCASE(pd.name) DESC";
  } else {
    $sql .= " ASC, LCASE(pd.name) ASC";
  }
  /** Я дописываю GROUP BY `sku` чтоб группировка шла по полю sku но выдает ошибку ***/
  $sql .= " GROUP BY `sku`";

  if (isset($data['start']) || isset($data['limit'])) {
    if ($data['start'] < 0) {
      $data['start'] = 0;
    }

    if ($data['limit'] < 1) {
      $data['limit'] = 20;
    }

    $sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
  }
  
  $product_data = array();

  $query = $this->db->query($sql);

  foreach ($query->rows as $result) {
    $product_data[$result['product_id']] = $this->getProduct($result['product_id']);
  }

  return $product_data;
}

Answer 1

a lot of code, only on freelansim.ru