I'm working on a blog/CMS type application where I use a number of
different models for different content types. Each of the content
types (article, book review, film review, etc.) is sub-classed from a
central "Node" model. What I'd like to be able to do is display a
list of all nodes on a page, blog-style, such that the details of each
node are shown. Unfortunately, I can't think of a good way to do
this, because each sub-class has different fields.
To make this a bit more concrete, here are the models in question:
------------------------------------------------------------------
class Section(models.Model):
section = models.CharField(max_length=50)
keyword = models.CharField(max_length=15)
class Admin:
pass
class Archetype(models.Model):
classname = models.CharField(max_length=15)
class Admin:
pass
class Node(models.Model):
author = models.ForeignKey(User)
created = models.DateTimeField()
published = models.BooleanField()
promoted = models.BooleanField()
section = models.ForeignKey(Section)
archetype = models.ForeignKey(Archetype)
title = models.CharField(max_length=255)
slug = models.SlugField(max_length=25, prepopulate_from=("title",))
def _blurb(self):
if self.archetype.classname is not "Node":
return getattr(self, self.archetype.classname.lower()).blurb
else:
return u"Created by %s" % (self.author.username,)
blurb = property(_blurb)
class Admin:
pass
class Article(Node):
body = models.TextField()
blurb = property(lambda self: blurbify(self.body, 100))
class Admin:
pass
class BookReview(Node):
book_author = models.CharField(max_length=255)
startdate = models.DateField()
enddate = models.DateField()
url = models.URLField()
body = models.TextField()
blurb = property(lambda self: blurbify(self.body, 100))
class Admin:
pass
class FilmReview(Node):
viewdate = models.DateField()
releasedate = models.DateField()
url = models.URLField()
rating = models.CharField(max_length = 2)
body = models.TextField()
blurb = property(lambda self: blurbify(self.body, 100))
class Admin:
pass
------------------------------------------------------------------
I've removed some member functions to make it a little simpler.
You'll notice the "blurb" attribute that Node and each of the sub-
classes implements. Originally I had only wanted to display a
shortened blurb, rather than the entire post, so this was an easy way
to do that. But now that I want to display the entire post for each
node, I don't know what to do.
One thing I thought of would be to do something similar to the blurb
attribute, having some sort of "display" attribute that each sub-class
would implement, which would return a formatted string that I could
then just throw up in the template. The problem with this approach is
that it's not very MVC-ish--I'm essentially putting template code into
the model.
What would be better is if I could call a separate template for each
item in the list, based on the Archetype or whatever, but I don't know
if there's any way to do that in Django. Any thoughts?
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
