How We Did Email Newsletters
- Tutorial
Hello, Habr!
For a long time I was going to write about how we in our company implemented email newsletters, but still did not reach our hands. In general, I do not need to tell you about the benefits of email marketing, I just want to share the technical details of the implementation of this task on Ruby on Rails.
It is necessary that users periodically receive emails under a certain condition. For example: User registered 5 days ago.
Each sent email must be logged in order to know whether we have already sent such and such a letter to such or such a user. First, create the EmailLog model.
Next, we describe the notification class that sends messages and writes a log:
Now we want to send a letter with the content like: “Hey, you registered, but you haven’t bought anything!” 5 days after registration. We need to describe the class of this notification
And here the most interesting thing is that all this must be periodically launched. We need a class that runs through all types of notifications and sends them depending on their conditions. Create a Worker Class
Done. So, to send notifications to the user, you can simply write in the console:
And all notifications, the conditions of which the current user will satisfy, will be sent.
But we need to do newsletters across the entire user base. The rake task , which we will run every day, for example, at 10 am cron , is perfect for this . For this we need gem whenever .
Well, that’s it, the newsletter works! If you have questions write comments, if there are no questions, then write comments;)
For a long time I was going to write about how we in our company implemented email newsletters, but still did not reach our hands. In general, I do not need to tell you about the benefits of email marketing, I just want to share the technical details of the implementation of this task on Ruby on Rails.
Task
It is necessary that users periodically receive emails under a certain condition. For example: User registered 5 days ago.
Implementation
Each sent email must be logged in order to know whether we have already sent such and such a letter to such or such a user. First, create the EmailLog model.
rails g model EmailLog user:belongs_to type:string
Next, we describe the notification class that sends messages and writes a log:
app / services / notifications / base.rb
moduleNotificationsmoduleNotificationclassBaseattr_reader:userdefinitialize(user)
@user = user
enddefperform?falseenddefsend!
NotificationMailer.send(notification_type, user).deliver
create_log!
end
private
defnotification_params
{
user_id: user.id,
type: notification_type
}
enddefnotification_typeself.class.name.demodulize.underscore
enddefcreate_log!
EmailLog.create!(notification_params)
endendendendNow we want to send a letter with the content like: “Hey, you registered, but you haven’t bought anything!” 5 days after registration. We need to describe the class of this notification
app / services / notifications / notification / five_days_after_registration.rb
moduleNotificationsmoduleNotificationclassFiveDaysAfterRegistration < Basedefperform?
user.created_at.to_date == 5.days.ago.to_date && EmailLog.where(log_params).blank?
endendendendAnd here the most interesting thing is that all this must be periodically launched. We need a class that runs through all types of notifications and sends them depending on their conditions. Create a Worker Class
app / services / notifications / worker.rb
moduleNotificationsclassWorker
EMAIL_TYPES = %w(
five_days_after_registration
)attr_reader:userdefinitialize(user)
@user = user
enddefgo!
EMAIL_TYPES.each do|notification_type|
notification_class = "notifications/notification/#{notification_type}".classify.constantize
notification = notification_class.new(user)
if notification.perform?
notification.send!
puts "Notification «#{notification_type}» was sent to #{user.email}"breakendendendendendDone. So, to send notifications to the user, you can simply write in the console:
Notifications::Worker.new(user).go!
And all notifications, the conditions of which the current user will satisfy, will be sent.
But we need to do newsletters across the entire user base. The rake task , which we will run every day, for example, at 10 am cron , is perfect for this . For this we need gem whenever .
lib / tasks / notifications.rake
namespace :notificationsdo
desc 'Lets send emails'
task send::environmentdo
User.where(receive_email_notifications:true).each do|user|
Notifications::Worker.new(user).go!
endendendconfig / schedule.rb
every :day, at:'10:00am'do
rake 'notifications:send', output:'log/notifications.log'endWell, that’s it, the newsletter works! If you have questions write comments, if there are no questions, then write comments;)