plugins/admin_notifications/lib/admin_notifications_plugin/notifications_user.rb
class AdminNotificationsPlugin::NotificationsUser < ApplicationRecord
self.table_name = "admin_notifications_plugin_notifications_users"
belongs_to :user, optional: true
belongs_to :notification, class_name: "AdminNotificationsPlugin::Notification", optional: true
attr_accessible :user_id, :notification_id
validates_uniqueness_of :user_id, scope: :notification_id
end