Hi there,
At the moment, I am building my site content system. The idea is that
categories are branches, and contents are leafs as defined by these
two models below:
from django.db import models
from django.contrib.auth.models import User
from django.contrib.auth.decorators import permission_required
from django.template.defaultfilters import slugify
from django.utils.translation import gettext_lazy as _
import datetime
PUBLISHED_CHOICES = (
(0, 'Draft'),
(1, 'Pending Review'),
(2, 'Published'),
(3, 'Archived'),
)
class Branch(models.Model):
parent_id=models.IntegerField(max_length=11)
title=models.CharField(max_length=100)
active=models.BooleanField()
generate_feed=models.BooleanField()
num_leafs=models.IntegerField(default=0)
def save(self):
self.slug = slugify(self.title)
super(Branch, self).save()
def __unicode__(self):
return self.title
class Admin:
pass
# Create your models here.
class Leaf(models.Model):
title=models.CharField(_('Title'), max_length=200)
body=models.TextField(_('Body'))
user=models.ForeignKey(User)
pub_date=models.DateTimeField('date published')
num_comments=models.IntegerField(default=0)
num_views=models.IntegerField(default=0)
published=models.IntegerField(max_length=1, choices=PUBLISHED_CHOICES)
front_page=models.BooleanField()
sticky=models.BooleanField()
allow_comments=models.BooleanField()
content_type=models.ForeignKey(Branch)
def save(self):
self.slug = slugify(self.title)
super(Leaf, self).save()
def __unicode(self):
return self.title
class Admin:
pass
As you can see in the Branch model, there is a field called num_leafs
- I've been reading the signals documentation and had a look on the
web, but I'm still having difficulty getting my head around it. What
I want to do is when a leaf is saved, on the post_save signal I want
to increment the parent branch's num_leafs field so it contains total
number of content leafs for that branch (as a counter cache). I also
need to go reduced it by one each time a leaf is removed. If I could
get some help with this first one (which I was able to implement
easily in PHP but just cannot translate to Django) I think I'll be
fine.
--
Tane Piper
Blog - http://digitalspaghetti.me.uk
AJAX Pastebin - http://pastemonkey.org
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