Send a notification to administrators on new event

app/mailers/event_mailer.rb

@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+class EventMailer < ActionMailer::Base
+  def new_event_notification(event)
+    @users = User.where(admin: true)
+    @event = event
+    mail(to: @users.map(&:email), subject: "Ново предложение за #{@event.class.model_name.human.mb_chars.downcase.to_s}: #{@event.title}")
+  end
+end

app/models/event.rb

@@ -8,4 +8,12 @@ class Event < ActiveRecord::Base
   belongs_to :track
   has_one :conference, through: :track
   belongs_to :user
+
+  after_create :send_new_event_notification
+
+  private
+
+  def send_new_event_notification
+    EventMailer.new_event_notification(self).deliver
+  end
 end

app/views/event_mailer/new_event_notification.text.erb

@@ -0,0 +1,24 @@
+Здравейте,
+
+Беше получено следното предложение за <%= @event.class.model_name.human.mb_chars.downcase.to_s %>:
+
+Потребител: <%= @event.user.email %>
+
+Заглавие: <%= @event.title %>
+
+Подзаглавие: <%= @event.title %>
+
+Поток: <%= @event.track.name %>
+
+Продължителност: <%= @event.length %>
+
+Език: <%= @event.language %>
+
+Резюме:
+<%= @event.abstract %>
+
+Описание:
+<%= @event.description %>
+
+Забележки:
+<%= @event.notes %>

db/migrate/20140902144335_add_admin_flag_to_users.rb

@@ -0,0 +1,5 @@
+class AddAdminFlagToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :admin, :boolean, null: false, default: false
+  end
+end