anchor.diff:  Querying
   ~~~~~~~~
   
  -If you are using django 1.7, you can use index or key lookup for filtering:
  -
  +Key or Index lookup
  +^^^^^^^^^^^^^^^^^^^
  +
  +.If you are using django 1.7, you can use index or key lookup for filtering
   [source, pycon]
   ----
   >>> Something.object.bulk_create([
  
positive.code: 1
  ----
  
  In other case, you can execute queries using postgresql operators thaks tu
  django's queryset `.extra()` method:
  
  [source, python]
  ----
  >>> Something.objects.extra(where=["data->>'name' = %s"], params=["foo"]).count()
  1
  ----
  
  
  NOTE: At this momment, with postgresql 9.3 as last stable version there is only a
  limited set of native operators for json type. When postgresql 9.4 is released, 
  more lookups will be added.
  
  
  
negative.code: 1
  ----
  
  .It also works for array indexes
  [source, pycon]
  ----
  >>> Something.object.bulk_create([
  