make the email notification more robust

app/models/content_instance.rb

@@ -94,7 +94,7 @@ class ContentInstance
   end
 
   def send_notifications
-    return unless self.content_type.api_enabled?
+    return unless self.content_type.api_enabled? && !self.content_type.api_accounts.blank?
 
     accounts = self.content_type.site.accounts.to_a
 

lib/locomotive.rb

@@ -1,4 +1,5 @@
 require 'mimetype_fu'
+require 'devise'
 
 require 'locomotive/version'
 require 'locomotive/core_ext'
@@ -52,6 +53,9 @@ module Locomotive
 
     # Heroku support
     self.enable_heroku if self.heroku?
+
+    # Devise
+    Devise.mailer_sender = self.config.mailer_sender
   end
 
   def self.logger(message)

spec/models/content_instance_spec.rb

@@ -80,6 +80,12 @@ describe ContentInstance do
       @content.save
     end
 
+    it 'does not send email notifications if no api accounts' do
+      @content_type.api_accounts = nil
+      Admin::Notifications.expects(:new_content_instance).never
+      @content.save
+    end
+
     it 'sends email notifications when a new instance is created' do
       Admin::Notifications.expects(:new_content_instance).with(@account_1, @content).returns(mock('mailer', :deliver => true))
       Admin::Notifications.expects(:new_content_instance).with(@account_2, @content).returns(mock('mailer', :deliver => true))