How to get all product categories and subcategories in Opencart?

Question

opencart

I need to get and view all the categories and subcategories of the current product.

Answer 1

$this->model_catalog_product->getCategories($product_id);

Answer 2

request is asynchronous, and the value of "j" in the loop runs further than the size of the array.
The correct solution without async would be:

for (var i = 0; i < itemIds.length; i++) {
  for (var j = 0; j < items.length; j++) {
    if (itemIds[i] == items[j].id) {
      if (i > 0) { // itemIds[-1] кинет всю ту же ошибку, потому проверяем на range
        i--;
      }

      (function (item) {
        request("http://.ru/cost.php?item=" + encodeURIComponent(item.market_hash_name), function(error, response, body) {
          if (!error && response.statusCode === 200) {
            if (body == "false") {
              logger.warn('Не нашел цену для предмета, пропускаю');
            } else {
              itemsin.push({
                user: res[0].name,
                ava: res[0].avatar,
                itemname: item.market_name,
                image: item.icon_url,
                color: item.name_color,
                market_hash_name: item.market_hash_name,
                steamid: offer.steamid_other,
                cost: parseFloat(body)
              });
            }
          }
        });
      })(items[j]);
    }
  }
}

Answer 3

Either you somehow copied it crookedly, or you have a problem with curly braces, namely, for (var j = 0; j < items.length; j++) {you closed the curly brace for the loop, and then you don’t close the curly brace for for (var i = 0; i < itemIds.length; i++) {, but );. And then 3 more curly braces are superfluous.
Try it like this:

var i = itemIds.length;
for (var i = 0; i < itemIds.length; i++) {
    for (var j = 0; j < items.length; j++) {
        if (itemIds[i] == items[j].id) {

            request("http://.ru/cost.php?item=" + encodeURIComponent(items[j].market_hash_name), function (error, response, body) {
                i--;
                if (!error && response.statusCode === 200) {
                    if (body == "false") {
                        logger.warn('Не нашел цену для предмета, пропускаю');
                    } else {
                        itemsin.push({
                            user: res[0].name,
                            ava: res[0].avatar,
                            itemname: items[j].market_name,
                            image: items[j].icon_url,
                            color: items[j].name_color,
                            market_hash_name: items[j].market_hash_name,
                            steamid: offer.steamid_other,
                            cost: parseFloat(body)
                        });
                    }
                }
            });
        }
    }
}

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See comments. The request function must be wrapped in a closure, otherwise j will be invalid.