Ruby on Rails：遍历电子邮件地址的复选框并向每个复选框发送电子邮件？

Question

我正在尝试在 RoR 中创建一个系统来发送电子邮件，我希望用户能够通过表单上的复选框选择多个电子邮件地址，然后系统循环通过每个选定的复选框发送一个给每个人发电子邮件。此时，用户可以在表单上选择多个电子邮件地址，系统将它们连接在一起，以便将一封电子邮件发送给多个收件人，例如用户选择电子邮件地址“1@a.com”和“2@b.com”，系统会向“1@a.com;2@b.com”发送电子邮件。

我通过视图做到了这一点：

<%= form_for(@email) do |f| %>
  <% if @email.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@email.errors.count, "error") %> prohibited this email from being saved:</h2>

      <ul>
      <% @email.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <p>
    <%= f.label :from_name %><br>
    <% if @user.present? %>
    <%= f.select :from_name, [@user.firstname + " " + @user.surname, @user.organisation] %>
    <% end %>
  </p>

  <p>
    <%= f.label :From_Email_Address %><br>
    <%= f.collection_select :account_id, Account.where(user_id: session[:user_id]), 
      :id,:email %>
  </p>

  <p>
    <%= f.label :to %><br>
    <%= f.collection_check_boxes(:to, @contacts, :email, :email) %>
  </p>

  <p>
    <%= f.label :cc %><br>
    <%= f.text_field :cc %>
  </p>

  <p>
    <%= f.label :bcc %><br>
    <%= f.text_field :bcc %>
  </p>

  <p>
    <%= f.label :subject %><br>
    <%= f.text_field :subject %>
  </p>

  <p>
    <%= f.label :message %><br>
    <%= f.text_field :message %>
  </p>

  <div class="actions">
    <%= f.submit %>
  </div>

<%= f.collection_check_boxes(:to, @contacts, :email, :email) %> 行显示保存在联系人数据库表中的每个电子邮件地址的复选框。

然后通过emails_controller，它具有以下代码：

class EmailsController < ApplicationController
  before_action :set_email, only: [:show, :edit, :update, :destroy]

  def index
    # Only show the email accounts for the user logged in
    @emails = Email.where(user_id: session[:user_id])
  end

  def show
  end

  def new
    @user = User.find(session[:user_id])
    @contacts = Contact.where(user_id: session[:user_id])
    @email = Email.new
  end

  def edit
    @user = User.find(session[:user_id])
    @contacts = Contact.where(user_id: session[:user_id])
  end

  def create
    @email = Email.new(email_params)
    @email.user_id = session[:user_id]
    @user = session[:user_id]
    if @email.save
        UserEmails.send_email(@email).deliver_now
        redirect_to @email, notice: 'Email was successfully created.'
    else
        redirect 'new'
    end
  end

  def update
      if @email.update(email_params)
        redirect_to @email, notice: 'Email was successfully updated.'
      else
        redirect 'edit'
      end
  end

  def destroy
    @email.destroy
    redirect_to emails_url, notice: 'Email was successfully destroyed.'
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_email
          @email = Email.find(params[:id])
end

    # Never trust parameters from the scary internet, only allow the white list through.
    def email_params 
        res = params.require(:email).permit(:account_id, :cc, :bcc, :subject, :message, :from_name, to: []) 
        res[:to] = res[:to].join('; ') 
        res 
    end
end

使用email_params 代码将选择的电子邮件地址与“;”一起连接每个人之间。

正如您在上面的 create 方法中看到的，代码 UserEmails.send_email(@email).deliver_now 在电子邮件保存后运行 - 此代码将电子邮件发送出去。

那么，我的问题是，是否有人可以帮助我更改代码，以便将一封电子邮件发送到表单上选择的每个电子邮件地址？

下面是我的带有复选框的表单的样子。

Answer 1

使用多项选择框，然后使用 select2 制作电子邮件地址选择框，就像谷歌在以下代码工作后所做的那样

您的表单

 <div class="form-group">
              <%= f.label :select_user_email %><br/>
              <select class="form-control select2" name="user[email][]">
                <option value="" selected disabled>Enter email address</option>
                <%@users.each do |user|%>
                    <option value="<%=user.email%>"><%=user.name%></option>
                <%end%>
              </select>
            </div>

def create
  @emails = (params[:email]).split(",")
  @emails.each do |email|
   UserMailer(email, @message).deliver_now
end
end

记住 select2 是一个 javascript 和 css 用于制作这样的选择框