  .. versionchanged:: 1.5
  
  All of the cautions in the note for the :meth:`defer` documentation apply to
  ``only()`` as well. Use it cautiously and only after exhausting your other
  options. Also note that using :meth:`only` and omitting a field requested
  using :meth:`select_related` is an error as well.
  
  .. versionchanged:: 1.5
  
  .. note::
  
 
</s> remove .. versionchanged:: 1.5

 </s> add  </s> remove .. note::
 </s> add     Using :meth:`only` and omitting a field requested using
    :meth:`select_related` is an error as well. </s> remove Some fields in a model won't be deferred, even if you ask for them. You can
never defer the loading of the primary key. If you are using
:meth:`select_related()` to retrieve related models, you shouldn't defer the
loading of the field that connects from the primary model to the related
one, doing so will result in an error.
 </s> add     Some fields in a model won't be deferred, even if you ask for them. You can
    never defer the loading of the primary key. If you are using
    :meth:`select_related()` to retrieve related models, you shouldn't defer the
    loading of the field that connects from the primary model to the related
    one, doing so will result in an error. </s> remove As of Django 1.7, when :class:`HttpResponse` is instantiated with an
iterator, it will consume it immediately, store the response content as a
string, and discard the iterator.
 </s> add     As of Django 1.7, when :class:`HttpResponse` is instantiated with an
    iterator, it will consume it immediately, store the response content as a
    string, and discard the iterator. </s> remove You can now use :class:`HttpResponse` as a file-like object even if it was
instantiated with an iterator. Django will consume and save the content of
the iterator on first access.
 </s> add     You can now use :class:`HttpResponse` as a file-like object even if it was
    instantiated with an iterator. Django will consume and save the content of
    the iterator on first access.
options.
  .. versionchanged:: 1.5
  
  All of the cautions in the note for the :meth:`defer` documentation apply to
  ``only()`` as well. Use it cautiously and only after exhausting your other
options.
options.
  
  .. versionchanged:: 1.5
  
  .. note::
  
keep keep keep keep replace replace keep keep keep keep keep
 Adapted uses of versionchanged/versionadded to the new form.

Refs #20104. 
docs/ref/models/querysets.txt