在Rails应用中发送电子邮件而不使用数据库模型

Question

我对Rails比较陌生。我使用Ruby 2.5和Rails 5.2创建了一个简单的应用程序，当网站访问者请求某些信息时，该应用程序将向管理员发送电子邮件。该应用程序不使用数据库，因为不会保存或存储任何访客信息，因此不使用ActiveRecord。只需通过表单从访问者那里获取一些信息并通过电子邮件发送即可。研究建议改为使用ActiveModel，但我仍然无法使其正常工作。无需第三方发送邮件应用程序。我在俯视什么？型号，控制器，视图，邮件程序代码显示在下面。

    #Model: Visitor.rb
    class Visitor
        include ActiveModel::Model
        include ActiveModel::Conversion
        extend ActiveModel::Naming
        include ActiveModel::Validations

        attr_accessor :fname, :lname, :phone, :email, :interest

        # Validations & Requirements
        validates :fname, presence: true, length: { maximum: 50 }
        validates :lname, presence: true, length: { maximum: 50 }
        validates :lname, presence: true, length: { maximum: 50 }
        VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
        validates :email, presence: true, length: { maximum: 255 }, format: { with: VALID_EMAIL_REGEX }
        validates :interest, presence: true

        def initialize(fname, lname, phone, email, interest)
            @fname = fname
            @lname = lname
            @phone = phone
            @email = email
            @interest = interest

            post_initialize
       end

       # #make in lieu of #create
       def self.make(fname, lname, phone, email, interest)
           attributes = {fname: fname, lname: lname, phone: phone, email: email, interest: interest}
           object = new(attributes)
           object.save
           @visitor = object
           @visitor
       end

      def persisted?
          false
      end

      def send_mail
          # Following method defined in NotifierMailer
          NotifierMailer.visitor_info(self).deliver_now
      end


      private

      def post_initialize
          if email
              email.downcase
          end
      end
    end

    # Controller: Visitors_controller.rb
    class VisitorsController < ApplicationController

        def new
            @Visitor = Visitor.new
        end

       def make
           @visitor = Visitor.new(visitor_params)
           if @visitor.valid?
               @visitor.send_mail # Instance method in Guest model
               flash[:notice] = "Your request has been sent! Thank you for contacting us."
               redirect_to welcome_path
           else
               render 'new'
           end
       end

       private

       def visitor_params
           params.require(:visitor).permit(:fname, :lname, :phone, :email, :interest)
       end
    end

    # Routes: Routes.rb
    Rails.application.routes.draw do
        get 'favicon', to: 'pages#favicon'

        root to: 'pages#index', as: 'welcome'

        # ... other routes for static page navigation

        get '/reqinfo', to: 'visitors#new'

        post '/reqinfo', to: 'visitors#make'
    end

    # View: New.html.erb
    <div class="row">
        <div class="col-md-6 col-md-offset-3">

            <%= form_with model: @visitor, url: reqinfo_path, local: true do |form| %>
                <%= render 'layouts/error_messages', object: form.object %>
                <%= form.label 'First Name' %>
                <%= form.text_field :fname, class: 'form-control' %>
                <%= form.label 'Last Name' %>
                <%= form.text_field :lname, class: 'form-control' %>
                <%= form.label :phone %>
                <%= form.text_field :phone, class: 'form-control' %>
                <%= form.label 'Email Address' %>
                <%= form.text_field :email, class: 'form-control' %>
                <%= form.label 'Interest' %>
                <%= form.text_field :interest, class 'form-control' %>
                <%= form.submit 'Submit', id: "button" %>
            <% end %><!-- form_with -->
        </div><!-- col-md6-3 -->
    </div><!-- row -->

     # Mailer: Notifier_mailer.rb
     class NotifierMailer < ApplicationMailer
         default from: 'noreply@thecompany.com'
         def guest_info(visitor)
             @visitor = visitor
             mail(to: 'admin@thecompany.com', subject: "Website Visitors Request for Information")
        end
     end

     # Message: Visitor_info.html.erb
     <h1>Dear Admin;</h1>
     <br>
     <% timestamp = Time.now %>
     <p>
         <%= visitor.fname %> <%= @visitor.lname %> visited the TheCompany website on <%= timestamp.localtime %>. He/she is requesting information regarding a <%= @visitor.interest %>. Their contact information phone: <%= @visitor.phone %> and email: <%= @visitor.email %>
     </p>