ruby-on-rails - rails : Why is the "number_with_delimiter" method not recognized inside my model?

Question

我有一个简单的验证:

class Product < ActiveRecord::Base
  # include ActionView::Helpers::NumberHelper
  ...
  validates_numericality_of :price, :less_than => 1000000, 
                            :message => "must be less than #{number_with_delimiter(1000000)}"                       
  ...
end

在此代码上，我收到以下错误:

undefined method `number_with_delimiter' for #<Class:0x2665a58>

我试图添加:

include ActionView::Helpers::NumberHelper

但这没有帮助。

我错过了什么？

Answer 1

好答案，使用:

ActiveSupport::NumberHelper::number_to_delimited(number, options={})