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

On 21.02.2012, at 14:08, ruby LED wrote:

> class LineItem < ActiveRecord::Base
> belongs_to :product
> belongs_to :cart
>
> def total_price
> if product.price
> product.price = product.price * quantity
> else
> 0.to_d
> end
> end
> end
>

So.

I agree that:
1) current_item = LineItem.new(:product_id=>product_id) = BAD IDEA. Because, if you pass the invalid product ID, LineItem would be initialized as well, but the .product association would return nil.

2) Actually I didn't see how quantity is set up? Looking at your previous code it must be method 'quantity'.

PS. Why are you writing product.price=?

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