Passing list of variants on cart permalink

[afallas]

Hi, I have created a dropdown in my cart page to get the city of a person before going to checkout page.

I have added the attribute in a permalink button 

<a type="submit" name="checkout" href="/cart/{{ line_item.variant_id }}:{{ line_item.quantity }}?checkout[shipping_address][city]={{cart.attributes["City"]}}">Continue</a>

the problem is that I am the variants and quantities are not being populated, is this syntax correct? {{ line_item.variant_id }}:{{ line_item.quantity }}

or is there another way of getting a list of all variants and quantities present in the cart.

[frst_10]

you could give this app a try https://apps.shopify.com/permalinks/ - pretty easy way to generate a permalink to /cart page

[afallas]

Thanks, just checked and this doesn't work for me since I need to get the variant ids depending on the products currently in the cart.