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1 """
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2 Models for the comments application.
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3 """
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4 from django.db import models
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5 from django.conf import settings
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6 from django.contrib.contenttypes.models import ContentType
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7 from django.contrib.contenttypes import generic
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8 from django.contrib.auth.models import User
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9 from django.core import urlresolvers
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10
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11 from core.markup import site_markup
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12
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13
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14 COMMENT_MAX_LENGTH = getattr(settings, 'COMMENT_MAX_LENGTH', 3000)
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15
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16 class CommentManager(models.Manager):
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17 """Manager for the Comment model class."""
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18
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19 def for_object(self, obj, filter_public=True):
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20 """QuerySet for all comments for a particular model instance."""
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21 ct = ContentType.objects.get_for_model(obj)
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22 qs = self.get_query_set().filter(content_type__pk=ct.id,
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23 object_id=obj.id)
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24 if filter_public:
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25 qs = qs.filter(is_public=True)
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26 return qs
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27
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28
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29 class Comment(models.Model):
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30 """My own version of a Comment class that can attach comments to any other model."""
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31 content_type = models.ForeignKey(ContentType)
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32 object_id = models.PositiveIntegerField()
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33 content_object = generic.GenericForeignKey('content_type', 'object_id')
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34 user = models.ForeignKey(User)
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35 comment = models.TextField(max_length=COMMENT_MAX_LENGTH)
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36 html = models.TextField(blank=True)
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37 creation_date = models.DateTimeField(auto_now_add=True)
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38 ip_address = models.IPAddressField('IP Address')
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39 is_public = models.BooleanField(default=True,
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40 help_text='Uncheck this field to make the comment invisible.')
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41 is_removed = models.BooleanField(default=False,
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42 help_text='Check this field to replace the comment with a ' \
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43 '"This comment has been removed" message')
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44
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45 # Attach manager
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46 objects = CommentManager()
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47
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48 class Meta:
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49 ordering = ('creation_date', )
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50
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51 def __unicode__(self):
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52 return u'%s: %s...' % (self.user.username, self.comment[:50])
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53
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54 def save(self, force_insert=False, force_update=False):
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55 self.html = site_markup(self.comment)
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56 super(Comment, self).save(force_insert, force_update)
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57
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58 def get_absolute_url(self):
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59 return self.get_content_object_url() + ('#c%s' % self.id)
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60
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61 def get_content_object_url(self):
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62 """
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63 Get a URL suitable for redirecting to the content object.
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64 """
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65 return urlresolvers.reverse(
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66 "comments-url-redirect",
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67 args=(self.content_type_id, self.object_id)
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68 )
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69
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70 def not_removed(self):
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71 """
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72 Returns not self.is_removed. Used on the admin display for
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73 "green board" display purposes.
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74 """
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75 return not self.is_removed
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76 not_removed.boolean = True
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77
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78
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79 class CommentFlag(models.Model):
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80 """This model represents a user flagging a comment as inappropriate."""
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81 user = models.ForeignKey(User)
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82 comment = models.ForeignKey(Comment)
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83 flag_date = models.DateTimeField(auto_now_add=True)
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84
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85 def __unicode__(self):
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86 return u'Comment ID %s flagged by %s' % (self.comment.id, self.user.username)
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87
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88 class Meta:
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89 ordering = ('flag_date', )
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90
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91 def get_comment_url(self):
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92 return '<a href="/admin/comments/comment/%s">Comment</a>' % self.comment.id
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93 get_comment_url.allow_tags = True
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94
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