如何在 Rails 应用程序表单中向电子邮件联系人发送电子邮件？

Question

我想在我的应用程序中有一个表单，登录用户可以输入他们朋友的电子邮件地址，点击发送，它会自动向他们输入表单的电子邮件地址发送一封电子邮件。这是我到目前为止所拥有的。当我单击按钮将您带到表单时，我得到了未初始化的常量，所以我不知道还有什么不起作用。

invitations_controller.rb

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

def create
     @invitation = Invitation.new(params[:invitation])
     @invitation.invited_by = current_user.invitation_token # set the sender to the current user
     if @invitation.save
      Mailer.invitation(@invitation, new_user_path(:invite_token =>  @invitation.invited_by)).deliver #send the invite data to our mailer to deliver the email
     else
      flash.now[:notice] = "Something went wrong"
      redirect_to root_url
     end
    end
   end

mailer.rb

class Mailer < ActionMailer::Base
 default from: "donotreply@mysite.com"

 def invitation(invitation, signup_url)
  subject    'Invitation'
  recipients @recipient_email
  from       'donotreply@mysite.com'
  body       :invitation => invitation, :signup_url => signup_url
  invitation.update_attribute(:sent_at, Time.now)
 end
end

invitation.html.erb

Mailer#invitation
You are invited to join our beta!

<%= signup_url(@invitation.invited_by) %>

new.html.erb（邀请表）

    <%= simple_form_for @invitation, :url => new_invitation_path do |f| %>
    <%= f.hidden_field :invitation_token, :value => @invitation.invited_by %>
    <%= f.label :email %>
    <%= f.email_field :email %>
    <%= f.submit 'Send' %>
    <% end %>

我什至无法进入邀请表单，因为我收到未初始化的常量错误。因此，据我所知，它的工作原理不止于此。请帮忙

Answer 1

你需要一个Invitation 模型。

rails generate model Invitation invited_by:string sent_at:timestamp

See the getting started guide