How to use a gem with a shaper?

Question

I have a Product model with the price_cents and price_currency fields. The currency of the currency is USD.

Model:

class Product < ActiveRecord::Base CURRENCIES = %w(USD EUR) composed_of :price, :class_name => "Money", :mapping => [%w(price_cents cents), %w(price_currency currency_as_string)], :constructor => Proc.new { |cents, currency| Money.new(cents || 0, currency || Money.default_currency) }, :converter => Proc.new { |value| value.respond_to?(:to_money) ? value.to_money : raise(ArgumentError, "Can't convert #{value.class} to Money") } end 

the form:

 = form_for @product do |f| = f.label :price = f.text_field :price = f.select :price_currency, Product::CURRENCIES = f.submit 

Controller creation method: @product = Product.new (params [: product])

Problem. When the user sets the price field to 100, for example, and price_currency in EUR, he creates a price using the default currency (USD). How can i fix this? Is it possible to do this, or should I do it in the controller (e.g. @ product.price.currency = ...)?

Answer 1

I had the same problem. Setting a currency using a form using a money gem

Solved it by adding one line to the create method. Check out the stream above and let me know that you need more help on this.