Question

我正在尝试使用railscasts第124集中的结构创建测试版邀请，并针对rails 3.2.8进行了更新。

目前，邀请电子邮件已发送，但不包含供用户注册的网址（包括邀请令牌），因为我在ActionMailer（@invitation_link）中创建的实例变量在视图中为零。在ActionMailer控制器中检查@invitation_link表明它指向了正确的URL，但在视图中它是nil。

我还检查了以下问题，但没有一个解决方案对我有用：

How do you use an instance variable with mailer in Ruby on Rails?

https://stackoverflow.com/questions/5831038/unable-to-access-instance-variable-in-mailer-view

Actionmailer instance variable problem Ruby on Rails

ActionMailer pass local variables to the erb template

以下相关代码段：

invitations_controller.rb

class InvitationsController < ApplicationController
  def new
    @invitation = Invitation.new
  end

  def create
    @invitation = Invitation.new(params[:invitation])
    @invitation.sender = current_user
    if @invitation.save
      if signed_in?
        InvitationMailer.invitation(@invitation).deliver
        flash[:notice] = "Thank you, invitation sent."
        redirect_to current_user
      else
        flash[:notice] = "Thank you, we will notify when we are ready."
        redirect_to root_url
      end
    else
      render :action => 'new'
    end
  end
end

在invitation_mailer.rb文件中

class InvitationMailer < ActionMailer::Base
  default from: "holler@thesite.com", content_type: "text/html"

  def invitation(invitation)
    mail to: invitation.recipient_email, subject: "Invitation"
    @invitation_link = invited_url(invitation.token)
    invitation.update_attribute(:sent_at, Time.now)
  end
end

视图/ invitation_mailer / invitation.text.erb

You are invited to join the site!

<%= @invitation_link %> # INSTANCE VARIABLE THAT IS NIL IN VIEW

routes.rb（仅显示相关行）

match '/invited/:invitation_token', to:  'users#new_invitee', as: 'invited'

Answer 1

试试这种方式

这是您的InvitationMailer

def invitation(invitation)
  @invitation = invitation
  mail(:to => @invitation.recipient_email, :subject => "Invitation")
end

现在，在InvitationsController

中

if signed_in?
  @invitation.update_attribute(:sent_at, Time.now)
  InvitationMailer.invitation(@invitation).deliver
  ...
else
  ...
end

现在，views/invitation_mailer/invitation.text.erb

You are invited to join the site!
<%= invited_url(@invitation.token) %> # INSTANCE VARIABLE THAT IS NIL IN VIEW

Answer 2

试试这个......

@invitation_link = invited_url(invitation.token, :host => "localhost:3000")

Rails - 电子邮件视图中的邮件程序实例变量为零

2 个答案: