如何扩展Django评论模型

Question

(Sorry for my bad english, i'm a shabby French)

I try to extend the django comment framework to add a like/dislike system. After read the documentation , i have added this to my model.py :

from django.contrib.comments.models import Comment

class Commentslikes(Comment):
    positif = models.IntegerField(default=0)
    negatif = models.IntegerField(default=0)

After launch the command python manage.py syncdb , django have created the commentslikes mysql table with 3 cols : comment_ptr_id , positif , negatif . It's ok.

In my view.py file, i have override the comment post view with this :

   def custom_comment_post(request, next=None, using=None):

        #Post the comment and get the response
        response = contrib_comments.post_comment(request, next, using)

        if type(response) == HttpResponseRedirect:
           redirect_path, comment_id = response.get('Location').split( '?c=' )
           if comment_id:
                comment = Comment.objects.get( id=comment_id )
                if comment:

               #For test, i try to add 20 positif likes, 10 dislikes and edit the comment with 'foo'
                comment.positif = 20
                comment.negatif = 10
                comment.comment = 'foo'
                comment.save()
                return HttpResponseRedirect( redirect_path + "#c" + comment_id)
       return response

Then I posted a test comment. Comment has been modified with 'foo' but no rows have been added in the commentslikes table with the id of comment, positif at 20 and negatif at 10. Not row for the comment has added in commentslikes

I have forgotten or done something ?

Thanks, Thomas

Answer 1

Bonjour Thomas,

well you've extended Comment with Commentslikes so you probably want to use that class "Commentslikes" in your view; not "Comment".

Side notes:

• it's usually better to avoid plural in Model class names and better to use camel case.
• you could use composition instead.