How to Set the Actionmailer Default_Url_Options's :Host Dynamically to the Request's Hostname

How to set the ActionMailer default_url_options's :host dynamically to the request's hostname?

It is also possible to set a default host that will be used in all mailers by setting the :host option in the default_url_options hash

in an application_controller.rb add:

class ApplicationController < ActionController::Base
  def default_url_options
    { host: request.host_with_port }
  end
end

Source: https://edgeguides.rubyonrails.org/action_controller_overview.html#default-url-options

Alternatively, you can pass the request when calling the mailer function from the controller

class UserMailer < ActionMailer::Base

  def welcome_email(user, request)
    @user = user
    @url  = user_url(@user, host: request.host_with_port ) # do this for each link
    mail(:to => user.email, :subject => "Welcome to My Awesome Site")
  end
end

Source : https://guides.rubyonrails.org/action_mailer_basics.html#generating-urls-with-named-routes

Change ActionMailer Email URL Host Dynamically

Okay after spending some time with it, I think I am starting to figure it out.

You got to use restful routes then you can set default_url_options[:host] = host in the Mailer action and :only_path to true in default_url_options for other controllers. Plus :locale.

And in the view I have: objects_url(object)

Since I have different hostnames, I pass request.host_with_port as a parameter from a controller to the Mailer when sending mail.

link_to doesn't accept parameters and url_for() can only build url from parts of it.

How to get dynamic host when sending email

You can pass the request when calling the mailer function from the controller--

class UserMailer < ActionMailer::Base

  def welcome_email(user, request)
    UserMailer.default_url_options[:host] = request.host_with_port #option1
    @user = user
    @url  = user_url(@user, host: request.host_with_port ) #option2 (do this for each link)
    mail(:to => user.email,
         :subject => "Welcome to My Awesome Site")
  end
end

In the above code request.host_with_port is the "example.com" for your case.

So above is the more dynamic way to provide the request host as you can see that you can pass the request when calling the mailer function from the controller.

This is the source that you can check -
Generating-urls-in-action-mailer-views.

This is also the explantion at action-mailer-default-url-options-and-request-host which is marked here for the answer to read.

How do I set default host for url helpers in rails?

asset_host doesn't work for urls

You need to override default_url_options in your ApplicationController (at least in Rails 3)

http://edgeguides.rubyonrails.org/action_controller_overview.html#default-url-options

class ApplicationController < ActionController::Base
  def default_url_options
    if Rails.env.production?
      {:host => "myproduction.com"}
    else  
      {}
    end
  end
end

How to make custom host working for devise mailer?

I made it working after looking through the code which is described in devise wiki for sending email using subdomain helper method.

module SubdomainHelper
  def with_subdomain(subdomain)
    subdomain = (subdomain || "")
    subdomain += "." unless subdomain.empty?
    host = Rails.application.config.action_mailer.default_url_options[:host]
    [subdomain, host].join
  end

  def url_for(options = nil)
   if options.kind_of?(Hash) && options.has_key?(:subdomain)
       options[:host] = with_subdomain(options.delete(:subdomain))
   end
   super
  end
end

All this helper method does is, check whether subdomain hash is present or not. If it's present then, the method prepends subdomain before host and define new host name else default host name. I didn't went through this process because for some reason it didn't worked on rails 3.2 and I didn't wanted to waste my time digging into it further due to strict time constraint.

I thought wait, why don't I just define the host name explicitly in mailer url_for method instead of traversing through all those methods.

So, all what I did was, defined link_to in mailer with a hash key host and passed value as my subdomain. After that it worked like a charm :).

In views/devise/mailer/reset_password_instructions.html.erb, confirmation link looks something as shown below:

<%= link_to 'Change my password', edit_password_url(@resource, :reset_password_token => @resource.reset_password_token, :host => 'app.mysite.com') %>

How to set config.action_controller.default_url_options = {:host = '#''} on per environment basis

Okay I figured it out the correct way to write it is

Rails.application.routes.default_url_options[:host] = 'localhost:3000'

:)

Dynamic domain name in Rails action mailer while using sidekiq

One of the options would be to associate each user with a domain and use this information when sending the email in sidekiq.

How do I get an absolute URL for an asset in Rails 3.1?

It would appear that as of recently, sass-rails now interprets the image_url command within a scss file in the expected manner, resolving to the final location of the image in question.

---

Related Topics