[Rails] Re: Re: nil can't be coerced into BigDecimal

Valery Kvon wrote in post #1047975:
> I didn't see you code completely, but
>
> line_items.to_a.sum { |item| item.total_price }
>
> How can it count correct if only ONE item in the cart? :)
>
> Obviously, if you want to get Array, use Array.wrap method like this:
>
> Array.wrap(line_items).sum { |item| item.total_price }

i tried Array.wrap(line_items).sum { |item| item.total_price }
also it worked same as the
line_items.to_a.sum { |item| item.total_price }
(i think?)
but im having the issue of not counting my first attemp maybe my
add_product code is wrong?

def add_product(product_id)
current_item = line_items.where(:product_id => product_id).first

if current_item
current_item.quantity = current_item.quantity.to_i + 1
else
current_item = LineItem.new(:product_id=>product_id)
line_items << current_item
end
current_item
end

it feels like im adding a nil value at my first attemp of adding a
product into my cart?
btw thanks for your concern with my post :)

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