Les mails peuvent maintenant gérés en converstation grâce aux headers message-id et in-reply-to

app/mailers/event_mailer.rb

@@ -3,6 +3,9 @@ class EventMailer < ActionMailer::Base
 
   def create(event)
     @event = event
-    mail to: event.contact, subject: t('event_mailer.create.subject', subject: event.title)
+
+    mail 'Message-ID' => "<event-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
+      to: event.contact,
+      subject: t('event_mailer.create.subject', subject: event.title)
   end
 end

app/mailers/moderation_mailer.rb

 class ModerationMailer < ActionMailer::Base
   default from: 'moderateurs@agendadulibre.org'
-  TO = 'moderateurs@agendadulibre.org'
+  default to: 'moderateurs@agendadulibre.org'
 
-  # Subject can be set in your I18n file at config/locales/en.yml
-  # with the following lookup:
-  #
-  #   en.moderation_mailer.create.subject
-  #
   def create(event)
     @event = event
 
-    mail to: TO, subject: t('moderation_mailer.create.subject', subject: event.title)
+    mail 'Message-ID' => "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
+      subject: t('moderation_mailer.create.subject', subject: event.title)
   end
 
   # Subject can be set in your I18n file at config/locales/en.yml
@@ -22,7 +18,8 @@ class ModerationMailer < ActionMailer::Base
     @event = event
     @current_user = current_user
 
-    mail to: TO, subject: t('moderation_mailer.update.subject', subject: event.title)
+    mail 'In-Reply-To' => "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
+      subject: t('moderation_mailer.update.subject', subject: event.title)
   end
 
   # Subject can be set in your I18n file at config/locales/en.yml
@@ -34,6 +31,7 @@ class ModerationMailer < ActionMailer::Base
     @event = event
     @current_user = current_user
 
-    mail to: TO, subject: t('moderation_mailer.moderate.subject', subject: event.title)
+    mail 'In-Reply-To' => "<mod-#{event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
+      subject: t('moderation_mailer.moderate.subject', subject: event.title)
   end
 end

app/mailers/note_mailer.rb

@@ -4,6 +4,8 @@ class NoteMailer < ActionMailer::Base
   def create(note)
     @note = note
 
-    mail to: note.event.contact, subject: t('note_mailer.create.subject', subject: note.event.title)
+    mail 'In-Reply-To' => "<event-#{note.event.id}@#{ActionMailer::Base.default_url_options[:host]}>",
+      to: note.event.contact,
+      subject: t('note_mailer.create.subject', subject: note.event.title)
   end
 end

app/models/event.rb

@@ -2,7 +2,7 @@ class Event < ActiveRecord::Base
   extend SimpleCalendar
 
   belongs_to :region, foreign_key: 'region'
-  has_many :notes
+  has_many :notes, dependent: :destroy
   has_one :related_city, foreign_key: :name, primary_key: :city, class_name: City
 
   validates_presence_of :title, :description, :city, :region, :url, :contact

test/mailers/event_mailer_test.rb

@@ -5,12 +5,11 @@ class EventMailerTest < ActionMailer::TestCase
     ActionMailer::Base.default_url_options[:host] = 'localhost:3000'
   end
 
-  test "create" do
-    mail = EventMailer.create(Event.last)
+  test 'create' do
+    mail = EventMailer.create Event.last
     assert_match(/\[Agenda du Libre\] Votre évènement: .* est en attente de modération/, mail.subject)
     assert_equal [Event.last.contact], mail.to
-    assert_equal ["moderateurs@agendadulibre.org"], mail.from
+    assert_equal ['moderateurs@agendadulibre.org'], mail.from
     assert_match(/Bonjour.*/, mail.body.encoded)
   end
-
 end