所以我读过&重新阅读Stephen Chu关于这个主题的文章(http://www.stephenchu.com/2008/05/rails-composedof-validation.html),但是我没有运气。
根据money gem文档money.rubyforge .org
中提供的示例模型
class Payment < ActiveRecord::Base
composed_of :amount,
: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) }
end
漂亮的瘦小控制器
class PaymentsController < ApplicationController
def create
@payment = Payment.new(params[:payment])
...
end
end
查看(HAML)
- form_for @payment do |p|
- p.fields_for :amount, @payment.amount do |a|
= a.label :cents
= a.text_field :cents
= a.label :currency
= a.text_field :currency, :value => :usd
我收到的错误是: 未定义的方法`美分'为{“美分”=&gt;“6.66”,“货币”=&gt;“usd”}:HashWithIndifferentAccess
'amount'散列被传递给composed_of为'cents',但根据文章,它应该使用表格中params中'amount'的属性。我真的卡住了:/
答案 0 :(得分:0)
编辑:我以前误解了你的问题。是的,在您的表单中,您需要以这种方式引用amount
:
- form_for @payment do |p|
= a.label :dollars
= a.text_field :amount
= a.label :currency
= a.text_field :currency, :value => :usd