Weird, I thought I posted this once already. Anyway, the solution was
adding this new initialize definition to my Product and ProductOrder
models:
def initialize(*params)
super(*params)
self.price = Money.new(cents, currency)
end
Brian
On Feb 1, 11:15 am, Bryan Larsen <[email protected]> wrote:
> David Mathers contributed this very nice Cents rich type:
>
> http://gist.github.com/127101
>
> I'm supposed to get it integrated into hobo-contrib. We finally added
> the capability to load rich types from a plugin, so I don't have any
> excuse any longer.
>
> I'm sure the money gem could be made to work, but I'm sure it's easier
> to code up a Money model from scratch using all the power that Hobo
> gives you.
>
> Bryan
>
>
>
> Brian Corbin wrote:
> > I was looking to add price information to the products in my
> > application. I may have to support other currencies besides USD in
> > the future, so I was looking at the Money gem
> > fromhttp://money.rubyforge.org/.
> > I'm pretty sure I've correctly added the code to my application;
> > here's what I've done:
>
> > I added a cents and currency field to my Product class, and a
> > composed_of helper for price:
> > class Product < ActiveRecord::Base
> > ...
> > fields do
> > ...
> > cents :integer, :default => 0
> > currency :string, :default => "USD"
> > end
> > composed_of :price, :class_name => "Money", :mapping => [ %w(cents,
> > cents), %w(currency, currency) ]
>
> > My Product class has some relations:
> > has_many :product_orders
> > has_many :orders, :through => :product_orders, :accessible => false
>
> > Now, I am thinking that the price of a Product can change depending on
> > several factors, and so the prices attached to the Product model are
> > just the default price you get when creating an Order. So the
> > ProductOrder join table also needs to have price information as well.
>
> > class ProductOrder < ActiveRecord::Base
> > ...
> > fields do
> > quantity :integer, :default => 1
> > cents :integer, :default => 0
> > currency :string, :default => "USD"
> > end
>
> > belongs_to :product
> > belongs_to :order
> > composed_of :price, :class_name => "Money", :mapping => [ %w(cents,
> > cents), %w(currency, currency) ]
> > end
>
> > I've also added these methods to both the Product and ProductOrders
> > models:
>
> > def formatted_price
> > self.price.format(:html)
> > end
>
> > def formatted_price=(price)
> > self.price = Money.new(price)
> > end
>
> > I run the migration and it adds the cents and currency fields to the
> > DB. When I fire up the application server, I get an error on the New
> > Order page:
>
> > NoMethodError in OrdersController#new
>
> > undefined method `round' for nil:NilClass
>
> > The full trace is here:http://pastebin.ca/1774588
>
> > The trace shows the error is occurring when it gets to the field-list
> > for Order, which includes products, and product_orders.
>
> > So my questions are: What is calling the round method, and what's it
> > being called on? How do I get my app to use the formatted_price
> > methods instead of the price, cents, or currency fields? Should I
> > pull out all this stuff and just use doubles and worry about other
> > currencies if/when that problem comes up? :) Thanks!
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