Action_mailer.default_url_options
A Rails question!
action_mailer.default_url_options
is a configuration option in Rails that allows you to set default URL options for Action Mailer.
When you send an email using Action Mailer, you may need to include links or URLs in the email body. By default, Action Mailer uses the url_for
method to generate these URLs. However, url_for
requires a host
and port
to generate the URL.
default_url_options
allows you to set default values for these options, so you don't have to specify them every time you use url_for
in your email templates.
Here's an example of how you might use default_url_options
:
# config/environments/production.rb
ActionMailer::Base.default_url_options = { host: 'example.com', port: 443 }
In this example, we're setting the default host
to example.com
and the default port
to 443 (which is the default HTTPS port). This means that when you use url_for
in your email templates, it will generate URLs with example.com
as the host and 443 as the port.
You can also set default_url_options
in your application.rb
file, like this:
# config/application.rb
module MyApplication
class Application < Rails::Application
config.action_mailer.default_url_options = { host: 'example.com', port: 443 }
end
end
This sets the default URL options for all Action Mailer instances in your application.
Note that you can also override default_url_options
on a per-mailer basis by setting it in the mailer class itself. For example:
# app/mailers/user_mailer.rb
class UserMailer < ApplicationMailer
default_url_options { { host: 'user.example.com', port: 443 } }
end
This sets the default URL options for the UserMailer
class to user.example.com
and 443.