django-rest-framework/examples/blogpost/models.py

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from django.db import models
from django.template.defaultfilters import slugify
import uuid
def uuid_str():
return str(uuid.uuid1())
RATING_CHOICES = ((0, 'Awful'),
(1, 'Poor'),
(2, 'OK'),
(3, 'Good'),
(4, 'Excellent'))
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MAX_POSTS = 10
class BlogPost(models.Model):
key = models.CharField(primary_key=True, max_length=64, default=uuid_str, editable=False)
title = models.CharField(max_length=128)
content = models.TextField()
created = models.DateTimeField(auto_now_add=True)
slug = models.SlugField(editable=False, default='')
class Meta:
ordering = ('created',)
@models.permalink
def get_absolute_url(self):
return ('blog-post', (), {'key': self.key})
@property
@models.permalink
def comments_url(self):
"""Link to a resource which lists all comments for this blog post."""
return ('comments', (), {'blogpost': self.key})
def __unicode__(self):
return self.title
def save(self, *args, **kwargs):
self.slug = slugify(self.title)
super(self.__class__, self).save(*args, **kwargs)
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for obj in self.__class__.objects.order_by('-pk')[MAX_POSTS:]:
obj.delete()
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class Comment(models.Model):
blogpost = models.ForeignKey(BlogPost, editable=False, related_name='comments')
username = models.CharField(max_length=128)
comment = models.TextField()
rating = models.IntegerField(blank=True, null=True, choices=RATING_CHOICES, help_text='How did you rate this post?')
created = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ('created',)
@models.permalink
def get_absolute_url(self):
return ('comment', (), {'blogpost': self.blogpost.key, 'id': self.id})
@property
@models.permalink
def blogpost_url(self):
"""Link to the blog post resource which this comment corresponds to."""
return ('blog-post', (), {'key': self.blogpost.key})