Update Action Mailer Basics [skip ci]

guides/source/action_mailer_basics.md

@@ -92,8 +92,8 @@ registered email address:
 class UserMailer < ApplicationMailer
   default from: 'notifications@example.com'
 
-  def welcome_email(user)
-    @user = user
+  def welcome_email
+    @user = params[:user]
     @url  = 'http://example.com/login'
     mail(to: @user.email, subject: 'Welcome to My Awesome Site')
   end
@@ -191,7 +191,7 @@ class UsersController < ApplicationController
     respond_to do |format|
       if @user.save
         # Tell the UserMailer to send a welcome email after save
-        UserMailer.welcome_email(@user).deliver_later
+        UserMailer.welcome_email.with(user: @user).deliver_later
 
         format.html { redirect_to(@user, notice: 'User was successfully created.') }
         format.json { render json: @user, status: :created, location: @user }
@@ -220,7 +220,7 @@ If you want to send emails right away (from a cronjob for example) just call
 class SendWeeklySummary
   def run
     User.find_each do |user|
-      UserMailer.weekly_summary(user).deliver_now
+      UserMailer.with(user: user).weekly_summary.deliver_now
     end
   end
 end
@@ -331,7 +331,7 @@ with the addresses separated by commas.
 
 ```ruby
 class AdminMailer < ApplicationMailer
-  default to: Proc.new { Admin.pluck(:email) },
+  default to: -> { Admin.pluck(:email) },
           from: 'notification@example.com'
 
   def new_registration(user)
@@ -351,8 +351,8 @@ address when they receive the email. The trick to doing that is to format the
 email address in the format `"Full Name" <email>`.
 
 ```ruby
-def welcome_email(user)
-  @user = user
+def welcome_email
+  @user = params[:user]
   email_with_name = %("#{@user.name}" <#{@user.email}>)
   mail(to: email_with_name, subject: 'Welcome to My Awesome Site')
 end
@@ -372,8 +372,8 @@ To change the default mailer view for your action you do something like:
 class UserMailer < ApplicationMailer
   default from: 'notifications@example.com'
 
-  def welcome_email(user)
-    @user = user
+  def welcome_email
+    @user = params[:user]
     @url  = 'http://example.com/login'
     mail(to: @user.email,
          subject: 'Welcome to My Awesome Site',
@@ -394,8 +394,8 @@ templates or even render inline or text without using a template file:
 class UserMailer < ApplicationMailer
   default from: 'notifications@example.com'
 
-  def welcome_email(user)
-    @user = user
+  def welcome_email
+    @user = params[:user]
     @url  = 'http://example.com/login'
     mail(to: @user.email,
          subject: 'Welcome to My Awesome Site') do |format|
@@ -453,8 +453,8 @@ the format block to specify different layouts for different formats:
 
 ```ruby
 class UserMailer < ApplicationMailer
-  def welcome_email(user)
-    mail(to: user.email) do |format|
+  def welcome_email
+    mail(to: params[:user].email) do |format|
       format.html { render layout: 'my_layout' }
       format.text
     end
@@ -477,7 +477,7 @@ special URL that renders them. In the above example, the preview class for
 ```ruby
 class UserMailerPreview < ActionMailer::Preview
   def welcome_email
-    UserMailer.welcome_email(User.first)
+    UserMailer.welcome_email.with(user: User.first)
   end
 end
 ```
@@ -594,12 +594,12 @@ mailer action.
 
 ```ruby
 class UserMailer < ApplicationMailer
-  def welcome_email(user, company)
-    @user = user
+  def welcome_email
+    @user = params[:user]
     @url  = user_url(@user)
-    delivery_options = { user_name: company.smtp_user,
-                         password: company.smtp_password,
-                         address: company.smtp_host }
+    delivery_options = { user_name: params[:company].smtp_user,
+                         password: params[:company].smtp_password,
+                         address: params[:company].smtp_host }
     mail(to: @user.email,
          subject: "Please see the Terms and Conditions attached",
          delivery_method_options: delivery_options)
@@ -616,9 +616,9 @@ will default to `text/plain` otherwise.
 
 ```ruby
 class UserMailer < ApplicationMailer
-  def welcome_email(user, email_body)
-    mail(to: user.email,
-         body: email_body,
+  def welcome_email
+    mail(to: params[:user].email,
+         body: params[:email_body],
          content_type: "text/html",
          subject: "Already rendered!")
   end
@@ -677,24 +677,43 @@ Action Mailer allows for you to specify a `before_action`, `after_action` and
 * You could use a `before_action` to populate the mail object with defaults,
   delivery_method_options or insert default headers and attachments.
 
+```ruby
+class InvitationsMailer < ApplicationMailer
+  before_action { @inviter, @invitee = params[:inviter], params[:invitee] }
+  before_action { @account = params[:inviter].account }
+
+  default to:       -> { @invitee.email_address },
+          from:     -> { common_address(@inviter) },
+          reply_to: -> { @inviter.email_address_with_name }
+
+  def account_invitation
+    mail subject: "#{@inviter.name} invited you to their Basecamp (#{@account.name})"
+  end
+
+  def project_invitation
+    @project    = params[:project]
+    @summarizer = ProjectInvitationSummarizer.new(@project.bucket)
+
+    mail subject: "#{@inviter.name.familiar} added you to a project in Basecamp (#{@account.name})"
+  end
+end
+```
+
 * You could use an `after_action` to do similar setup as a `before_action` but
   using instance variables set in your mailer action.
 
 ```ruby
 class UserMailer < ApplicationMailer
+  before_action { @business, @user = params[:business], params[:user] }
+
   after_action :set_delivery_options,
                :prevent_delivery_to_guests,
                :set_business_headers
 
-  def feedback_message(business, user)
-    @business = business
-    @user = user
-    mail
+  def feedback_message
   end
 
-  def campaign_message(business, user)
-    @business = business
-    @user = user
+  def campaign_message
   end
 
   private