Actionmailer - 未定义的“用户” - PDF 附件

Question

我正在尝试将我的 PDF 附加到电子邮件中。但是，当我单击链接时，我收到以下错误 undefiined method 'user' 我有以下设置：

控制器

 def index
    @hospital_bookings = HospitalBooking.scoped
    hospital_booking = @hospital_bookings
    @user = User.all

    if params[:format] == "pdf"
      @hospital_bookings = @hospital_bookings.where(:day => Date.today.beginning_of_month..Date.today.end_of_month)
    end

    respond_to do |format|
      format.html
      format.pdf do
        render :pdf => "#{Date.today.strftime("%B")} Overtime Report",
               :header => {:html => {:template => 'layouts/pdf.html.erb'}}
        OvertimeMailer.overtime_pdf(hospital_booking).deliver
      end
    end
  end

overtime_mailer.rb

class OvertimeMailer < ActionMailer::Base

  default :from => DEFAULT_FROM

  def overtime_pdf(hospital_booking)
    @hospital_bookings = hospital_booking
    attachments["Overtime Report.pdf"] = WickedPdf.new.pdf_from_string(
        render_to_string(:pdf => "Overtime Report",:template => 'layouts/pdf.html.erb'))
    mail(:to => hospital_booking.user.email, :subject => "Overtime Report")
  end
end

错误发生在以下行mail(:to => hospital_booking.user.email, :subject => "Overtime Report"

Answer 1

hospital_booking 在此代码上

OvertimeMailer.overtime_pdf(hospital_booking).deliver

是一个ActiveRecord::Relation 对象。您可能想在控制器中调用 HospitalBooking.scoped.first 或只是 HospitalBooking.first。