我正在尝试在一个虾类中使用rails 3.2助手,但是rails会抛出：
undefined method `number_with_precision' for #<QuotePdf:0x83d4188>
虾类
class QuotePdf < Prawn::Document
def initialize(quote)
super()
text "sum: #{number_with_precision(quote.sum)}"
end
end
调节器
def show
@quote = current_user.company.quotes.where(:id => params[:id]).first
head :unauthorized and return unless @quote
respond_with @quote,:layout => !params[:_pjax] do |format|
format.pdf do
send_data QuotePdf.new(@quote).render,filename: "Devis-#{@quote.date_emission.strftime("%d/%m/%Y")}.pdf",type: "application/pdf"
end
end
end
谢谢你的帮助.
解决方法
您必须在您的prawn文档类中显式包含ActionView :: Helpers :: NumberHelper(或任何其他帮助程序类/模块).
class QuotePdf < Prawn::Document
include ActionView::Helpers::NumberHelper # <-
def initialize(quote)
super()
text "sum: #{number_with_precision(quote.sum)}"
end
end