title: django-notification emit_notices extra sql queries?
body: <p>So I've been trying to figure out why django-notification emit_notices prints out multiple extra queries that dont have to do anything with my notices queue</p>
  
  <p>i run in the interpreter:</p>
  
  <pre><code>notification.queue([to_user], "new_msg", {"from_user": from_user}, sender=from_user)
  </code></pre>
  
  <p>then</p>
  
  <pre><code>python manage.py emit_notices
  
  ------------------------------------------------------------------------
  acquiring lock...
  acquired.
  (0.001) SELECT `notification_noticequeuebatch`.`id`, `notification_noticequeuebatch`.`pickled_data` FROM `notification_noticequeuebatch`; args=()
  (0.001) SELECT `auth_user`.`id`, `auth_user`.`username`, `auth_user`.`first_name`, `auth_user`.`last_name`, `auth_user`.`email`, `auth_user`.`password`, `auth_user`.`is_staff`, `auth_user`.`is_active`, `auth_user`.`is_superuser`, `auth_user`.`last_login`, `auth_user`.`date_joined` FROM `auth_user` WHERE `auth_user`.`id` = 3 ; args=(3,)
  emitting notice new_msg to userTest
  (0.000) SELECT `notification_noticetype`.`id`, `notification_noticetype`.`label`, `notification_noticetype`.`display`, `notification_noticetype`.`description`, `notification_noticetype`.`default` FROM `notification_noticetype` WHERE `notification_noticetype`.`label` = new_msg ; args=('new_msg',)
  (0.000) SELECT `django_site`.`id`, `django_site`.`domain`, `django_site`.`name` FROM `django_site` WHERE `django_site`.`id` = 1 ; args=(1,)
  (0.001) SELECT `cities_city`.`id`, `cities_city`.`name` FROM `cities_city`; args=()
  </code></pre>
  
  <p>And many other extra sql queries (like the last one - select from cities_city ) which dont have anything to do with the notification.queue() written above.</p>
  
  <p>emit_notices calls send_all() and send_all() calls </p>
  
  <pre><code>send_now([to_user], label, extra_context, on_site, sender)
  </code></pre>
  
  <p>I dont see the relation with cities which is a totally different app of my project.</p>
  
  <p>However it works, but I wanna figure out why is this happening. Am I doing something wrong?</p>
  
  <p>Cheers</p>