金銭でフォームを選択して通貨を設定する

Question

私はこの1つで数時間働いていますが、私はこれを理解できません。

私は、ユーザーがフォームに記入した価格に対応する通貨を選択させてもらいたいと思います。

私はMoney Gem（https://github.com/RubyMoney/money）を使用しています。すべての値は正しく設定されていますが、フォームを介して送信されるものはデフォルト値（USD）に設定されている通貨ではありません。私はこれが私のMoney Gemに関する経験不足だと思う。私のモデルでは

：

require 'money' 
    composed_of :price_per_unit, 
    :class_name => "Money", 
    :mapping => [%w(cents_per_unit cents), %w(currency currency_as_string)], 
    :constructor => Proc.new { |cents_per_unit, currency| Money.new(cents_per_unit || 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") } 

    composed_of :total_price, 
    :class_name => "Money", 
    :mapping => [%w(cents cents), %w(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") } 

：price_per_unitと：通貨属性：共通TOTAL_PRICEシェア。

：cents_per_unitと通貨 での作業price_per_unit：私の新しいフォームビューで

def new 
    @power_plant_substrate = PowerPlantSubstrate.new 

    # preparing the form select for the currencies 
    @currencies = [] 
    major_currencies(Money::Currency::TABLE).each do |currency| 
     name = Money::Currency::TABLE[currency][:name] 
     iso_code = Money::Currency::TABLE[currency][:iso_code] 
     @currencies << [name, iso_code] 
    end 
    end 

：私のコントローラでセントと通貨

で作業TOTAL_PRICE

 <p> 
     <%= f.select(:currency, @currencies) %> 
     </p> 
     <p> 
     <%= f.label :price_per_unit %> 
     <%= f.number_field :price_per_unit, :size => 5, :value => 0, :step => 0.01, :min => 0 %> 
     </p> 
     <p> 
     <%= f.label :total_price %> 
     <%= f.number_field :total_price, { :step => 1, :size => 10, :value => 0 } %> 
     </p> 

私がしようとしませんでしたデフォルトの通貨をAUDに変更すると、選択したすべてのレコードがAUDに設定されます。私のログで

：

Started POST "/power_plant_substrates" for 127.0.0.1 at 2011-11-03 00:40:38 +0100 
    Processing by PowerPlantSubstratesController#create as JS 
    Parameters: {"utf8"=>"✓", "feedstock"=>"", "power_plant_substrate"=>{"power_plant_id"=>"59", "substrate_id"=>"159", "quantity"=>"1", "trade"=>"selling", "currency"=>"JPY", "price_per_unit"=>"1.00", "total_price"=>"1", "address"=>"Pélussin, France", "transport"=>"pickup_only", "latitude"=>"", "longitude"=>"", "description"="sadf"}, "commit"=>"Save"} 
    User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 21]] 
    PowerPlant Load (0.3ms) SELECT "power_plants".* FROM "power_plants" WHERE "power_plants"."user_id" = 21 AND "power_plants"."name" = 'My Tradings' LIMIT 1 
    SQL (0.7ms) INSERT INTO "power_plant_substrates" ("address", "cents", "cents_per_unit", "created_at", "currency", "description", "gmaps", "latitude", "locale", "longitude", "period","power_plant_id", "quantity", "state", "substrate_id", "trade", "transport","unit_of_measure", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,?, ?, ?, ?, ?) [["address", "Pélussin, France"], ["cents", 100], ["cents_per_unit", 100], ["created_at", Wed, 02 Nov 2011 23:40:39 UTC +00:00], ["currency", "CAD"], ["description", "sadf"], ["gmaps", true], ["latitude", 45.417608], ["locale", "us"], ["longitude", 4.676041], ["period", "year"], ["power_plant_id", 59], ["quantity", 1], ["state", "open"], ["substrate_id", 159], ["trade", "selling"], ["transport", "pickup_only"], ["unit_of_measure", "mass"], ["updated_at", Wed, 02 Nov 2011 23:40:39 UTC +00:00]] 
Completed 200 OK in 1107ms (Views: 4.3ms | ActiveRecord: 2.5ms) 

任意のアイデア？

乾杯、

ジョエル

Answer 1

が解決しよう!!作成方法1本のラインを追加することによって解決

def create 
    @power_plant_substrate = PowerPlantSubstrate.new(params[:power_plant_substrate]) 

    # here I am setting the currency with what was sent in params 
    @power_plant_substrate.currency = params[:power_plant_substrate][:currency] <=== this line 

... 

end