/docs/ref/contrib/comments/upgrade.txt

 1===============================================
 2Upgrading from Django's previous comment system
 3===============================================
 4
 5Prior versions of Django included an outdated, undocumented comment system. Users who reverse-engineered this framework will need to upgrade to use the
 6new comment system; this guide explains how.
 7
 8The main changes from the old system are:
 9
10    * This new system is documented.
11    
12    * It uses modern Django features like :doc:`forms </topics/forms/index>` and
13      :doc:`modelforms </topics/forms/modelforms>`.
14
15    * It has a single ``Comment`` model instead of separate ``FreeComment`` and
16      ``Comment`` models.
17
18    * Comments have "email" and "URL" fields.
19
20    * No ratings, photos and karma. This should only effect World Online.
21
22    * The ``{% comment_form %}`` tag no longer exists. Instead, there's now two
23      functions: ``{% get_comment_form %}``, which returns a form for posting a
24      new comment, and ``{% render_comment_form %}``, which renders said form
25      using the ``comments/form.html`` template.
26      
27    * The way comments are include in your URLconf have changed; you'll need to
28      replace::
29    
30            (r'^comments/', include('django.contrib.comments.urls.comments')),
31      
32      with::
33
34            (r'^comments/', include('django.contrib.comments.urls')),
35
36Upgrading data
37--------------
38
39The data models for Django's comment system have changed, as have the
40table names. Before you transfer your existing data into the new comments
41system, make sure that you have installed the new comments system as
42explained in the
43:doc:`quick start guide </ref/contrib/comments/index>`.
44This will ensure that the new tables have been properly created.
45
46To transfer your data into the new comments system, you'll need to directly
47run the following SQL:
48
49.. code-block:: sql
50
51    BEGIN;
52
53    INSERT INTO django_comments 
54        (content_type_id, object_pk, site_id, user_name, user_email, user_url,
55        comment, submit_date, ip_address, is_public, is_removed)
56    SELECT
57        content_type_id, object_id, site_id, person_name, '', '', comment,
58        submit_date, ip_address, is_public, not approved
59    FROM comments_freecomment;
60
61    INSERT INTO django_comments 
62        (content_type_id, object_pk, site_id, user_id, user_name, user_email,
63        user_url, comment, submit_date, ip_address, is_public, is_removed)
64    SELECT 
65        content_type_id, object_id, site_id, user_id, '', '', '', comment,
66        submit_date, ip_address, is_public, is_removed
67    FROM comments_comment;
68
69    UPDATE django_comments SET user_name = (
70        SELECT username FROM auth_user 
71        WHERE django_comments.user_id = auth_user.id
72    ) WHERE django_comments.user_id is not NULL;
73    UPDATE django_comments SET user_email = (
74        SELECT email FROM auth_user 
75        WHERE django_comments.user_id = auth_user.id
76    ) WHERE django_comments.user_id is not NULL;
77    
78    COMMIT;