Move commentaire creation to model

app/controllers/commentaires_controller.rb

@@ -51,8 +51,6 @@ class CommentairesController < ApplicationController
 
       redirect_to url_for(controller: 'backoffice/dossiers', action: :show, id: params['dossier_id'])
     else
-      NotificationService.new('commentaire', @commentaire.dossier.id).notify if saved
-
       if current_user.email != @commentaire.dossier.user.email
         invite = Invite.where(dossier: @commentaire.dossier, user: current_user).first
         redirect_to url_for(controller: 'users/dossiers/invites', action: :show, id: invite.id)

app/models/commentaire.rb

@@ -4,7 +4,15 @@ class Commentaire < ActiveRecord::Base
 
   belongs_to :piece_justificative
 
+  after_save :internal_notification
+
   def header
     "#{email}, " + created_at.localtime.strftime('%d %b %Y %H:%M')
   end
+
+  private
+
+  def internal_notification
+    NotificationService.new('commentaire', self.dossier.id).notify
+  end
 end