Question

我收到以下错误：

PaymentsController中的NoMethodError＃summary

未定义的方法`空？为零：NilClass   提取的来源（第134行）：

132    format.pdf do
133    pdf = SummaryPdf.new(@klasses)
134    send_data pdf.render, filename: "Payments Summary_#{AcademicTerm.current.details}.pdf", type: "application/pdf"
135   end
136 end
137end

SummaryPdf是一个负责打印学校付款收入摘要的班级。它在支付控制器下定义为

def summary
  @klasses = Klass.all
  respond_to do |format|
    format.html {render "summary"}
    format.pdf do
      pdf = SummaryPdf.new(@klasses)
      send_data pdf.render, filename: "Payments Summary_#{AcademicTerm.current.details}.pdf", type: "application/pdf"
    end
  end
end

的routes.rb

resources :payments do
  get 'search_form', :on=>:collection
  get 'klass_menu',:on =>:collection
  get 'byklass',:on =>:collection
  get 'enrolment',:on =>:collection
  get 'bystudent',:on =>:collection
  get 'with_balance', :on=>:collection
  get 'fully_paid', :on=>:collection
  get 'all_with_balance', :on=>:collection
  get 'all_fully_paid', :on=>:collection
  get 'summary', :on=>:collection

那么，谁能帮我解决这个问题？

Answer 1

不知道render方法在第134行上完全做了什么，但您确定可以在未保存的SummaryPdf对象上调用它吗？我说render方法需要一个已保存的实例。

PaymentsController中的NoMethodError＃summary，undefined方法`empty？'为零：NilClass

1 个答案: