preview mailers rails

To preview mailers in Ruby on Rails, you can follow these steps:

  1. Create a new mailer: Start by creating a new mailer in your Rails application. This can be done by running the following command in your terminal: rails generate mailer <MailerName> Replace <MailerName> with the desired name for your mailer.

  2. Define a preview class: Inside the test/mailers/previews directory, create a new file named <MailerName>_preview.rb. This file should contain your mailer's preview class. For example, if your mailer is named UserMailer, the preview class file would be user_mailer_preview.rb.

  3. Define preview methods: In the preview class file, define methods that will generate preview content for your mailers. Each method should return a mailer instance with the desired attributes. For example: ruby class UserMailerPreview < ActionMailer::Preview def welcome_email UserMailer.welcome_email(User.first) end end In this example, the welcome_email method generates a preview of the welcome email, passing in the first user from the database.

  4. Configure preview routes: In your config/routes.rb file, add the following line to enable mailer previews: ruby if Rails.env.development? mount MyMailerPreview => 'mailers' end Replace MyMailerPreview with the name of your mailer preview class.

  5. Access the previews: Start your Rails server and go to http://localhost:3000/mailers in your browser. You should see a list of available mailers and their preview methods. Click on a method to view the preview content.

By following these steps, you can easily preview your mailers in Ruby on Rails.