Get an array of product.id that are in the cart

Question

I'm trying to cycle over all my product.id in my cart. I have a various product with the same product.id but different line_item.

Example:

line.item[1]: productID 2756695130141

line.item[2]: productID 2756695130141

line.item[3]: productID 2756702765085

line.item[4]: productID 2756695130141

I want to know how many different productID I have (in this case, 2). How can I do this in Liquid/Shopify?

Answer 1

Best way to do that is to use arrays. Because they have map and unique.

This code will return array of unique product IDs

{% assign uniqueProductIdsArray= cart.items | map: 'product_id'| uniq  %}

This code will return concatenated string of unique product IDs

{% assign uniqueProductIdsString= cart.items | map: 'product_id'| uniq | join: ', ' %}

Documentation about Array filters in liquid: https://help.shopify.com/themes/liquid/filters/array-filters

Answer 2

I think this code may help you

{% for item in cart.items %}
      {{ item.id }} //This will return product id of items in cart
{% endfor %}

Please write back if this is not the solution you are looking for.

EDIT

{% assign uniqueProductIdsArray= cart.items | map: 'id'| uniq  %}

Answer 3

// Best and easy solution

{% for item in cart.items %}
{{item.product.id}} {% endfor %}`