author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Fri, 10 Oct 2008 13:14:24 +0000 | |
changeset 297 | 35211afcd563 |
parent 54 | 03e267d67478 |
child 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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import datetime |
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|
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from django.db import models |
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from django.contrib.contenttypes.models import ContentType |
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from django.contrib.sites.models import Site |
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from django.contrib.auth.models import User |
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from django.utils.translation import ugettext_lazy as _ |
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from django.conf import settings |
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|
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MIN_PHOTO_DIMENSION = 5 |
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MAX_PHOTO_DIMENSION = 1000 |
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# Option codes for comment-form hidden fields. |
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PHOTOS_REQUIRED = 'pr' |
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PHOTOS_OPTIONAL = 'pa' |
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RATINGS_REQUIRED = 'rr' |
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RATINGS_OPTIONAL = 'ra' |
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IS_PUBLIC = 'ip' |
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# What users get if they don't have any karma. |
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DEFAULT_KARMA = 5 |
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KARMA_NEEDED_BEFORE_DISPLAYED = 3 |
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class CommentManager(models.Manager): |
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def get_security_hash(self, options, photo_options, rating_options, target): |
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""" |
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Returns the MD5 hash of the given options (a comma-separated string such as |
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'pa,ra') and target (something like 'lcom.eventtimes:5157'). Used to |
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validate that submitted form options have not been tampered-with. |
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""" |
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import md5 |
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return md5.new(options + photo_options + rating_options + target + settings.SECRET_KEY).hexdigest() |
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|
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def get_rating_options(self, rating_string): |
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""" |
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Given a rating_string, this returns a tuple of (rating_range, options). |
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>>> s = "scale:1-10|First_category|Second_category" |
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>>> Comment.objects.get_rating_options(s) |
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([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], ['First category', 'Second category']) |
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""" |
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rating_range, options = rating_string.split('|', 1) |
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rating_range = range(int(rating_range[6:].split('-')[0]), int(rating_range[6:].split('-')[1])+1) |
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choices = [c.replace('_', ' ') for c in options.split('|')] |
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return rating_range, choices |
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def get_list_with_karma(self, **kwargs): |
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""" |
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Returns a list of Comment objects matching the given lookup terms, with |
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_karma_total_good and _karma_total_bad filled. |
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""" |
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extra_kwargs = {} |
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extra_kwargs.setdefault('select', {}) |
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extra_kwargs['select']['_karma_total_good'] = 'SELECT COUNT(*) FROM comments_karmascore, comments_comment WHERE comments_karmascore.comment_id=comments_comment.id AND score=1' |
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extra_kwargs['select']['_karma_total_bad'] = 'SELECT COUNT(*) FROM comments_karmascore, comments_comment WHERE comments_karmascore.comment_id=comments_comment.id AND score=-1' |
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return self.filter(**kwargs).extra(**extra_kwargs) |
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def user_is_moderator(self, user): |
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if user.is_superuser: |
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return True |
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for g in user.groups.all(): |
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if g.id == settings.COMMENTS_MODERATORS_GROUP: |
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return True |
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return False |
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class Comment(models.Model): |
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"""A comment by a registered user.""" |
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user = models.ForeignKey(User, raw_id_admin=True) |
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content_type = models.ForeignKey(ContentType) |
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object_id = models.IntegerField(_('object ID')) |
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headline = models.CharField(_('headline'), max_length=255, blank=True) |
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comment = models.TextField(_('comment'), max_length=3000) |
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rating1 = models.PositiveSmallIntegerField(_('rating #1'), blank=True, null=True) |
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rating2 = models.PositiveSmallIntegerField(_('rating #2'), blank=True, null=True) |
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rating3 = models.PositiveSmallIntegerField(_('rating #3'), blank=True, null=True) |
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rating4 = models.PositiveSmallIntegerField(_('rating #4'), blank=True, null=True) |
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rating5 = models.PositiveSmallIntegerField(_('rating #5'), blank=True, null=True) |
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rating6 = models.PositiveSmallIntegerField(_('rating #6'), blank=True, null=True) |
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rating7 = models.PositiveSmallIntegerField(_('rating #7'), blank=True, null=True) |
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rating8 = models.PositiveSmallIntegerField(_('rating #8'), blank=True, null=True) |
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# This field designates whether to use this row's ratings in aggregate |
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# functions (summaries). We need this because people are allowed to post |
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# multiple reviews on the same thing, but the system will only use the |
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# latest one (with valid_rating=True) in tallying the reviews. |
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valid_rating = models.BooleanField(_('is valid rating')) |
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submit_date = models.DateTimeField(_('date/time submitted'), auto_now_add=True) |
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is_public = models.BooleanField(_('is public')) |
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ip_address = models.IPAddressField(_('IP address'), blank=True, null=True) |
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is_removed = models.BooleanField(_('is removed'), help_text=_('Check this box if the comment is inappropriate. A "This comment has been removed" message will be displayed instead.')) |
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site = models.ForeignKey(Site) |
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objects = CommentManager() |
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|
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class Meta: |
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verbose_name = _('comment') |
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verbose_name_plural = _('comments') |
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ordering = ('-submit_date',) |
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|
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class Admin: |
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fields = ( |
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(None, {'fields': ('content_type', 'object_id', 'site')}), |
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('Content', {'fields': ('user', 'headline', 'comment')}), |
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('Ratings', {'fields': ('rating1', 'rating2', 'rating3', 'rating4', 'rating5', 'rating6', 'rating7', 'rating8', 'valid_rating')}), |
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('Meta', {'fields': ('is_public', 'is_removed', 'ip_address')}), |
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) |
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list_display = ('user', 'submit_date', 'content_type', 'get_content_object') |
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list_filter = ('submit_date',) |
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date_hierarchy = 'submit_date' |
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|
109 |
search_fields = ('comment', 'user__username') |
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|
110 |
|
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111 |
def __unicode__(self): |
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112 |
return "%s: %s..." % (self.user.username, self.comment[:100]) |
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113 |
|
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114 |
def get_absolute_url(self): |
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115 |
try: |
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116 |
return self.get_content_object().get_absolute_url() + "#c" + str(self.id) |
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117 |
except AttributeError: |
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118 |
return "" |
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119 |
|
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120 |
def get_crossdomain_url(self): |
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121 |
return "/r/%d/%d/" % (self.content_type_id, self.object_id) |
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122 |
|
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123 |
def get_flag_url(self): |
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124 |
return "/comments/flag/%s/" % self.id |
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125 |
|
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126 |
def get_deletion_url(self): |
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127 |
return "/comments/delete/%s/" % self.id |
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128 |
|
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129 |
def get_content_object(self): |
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130 |
""" |
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131 |
Returns the object that this comment is a comment on. Returns None if |
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132 |
the object no longer exists. |
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133 |
""" |
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134 |
from django.core.exceptions import ObjectDoesNotExist |
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135 |
try: |
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136 |
return self.content_type.get_object_for_this_type(pk=self.object_id) |
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137 |
except ObjectDoesNotExist: |
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138 |
return None |
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139 |
|
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140 |
get_content_object.short_description = _('Content object') |
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141 |
|
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142 |
def _fill_karma_cache(self): |
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143 |
"""Helper function that populates good/bad karma caches.""" |
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144 |
good, bad = 0, 0 |
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145 |
for k in self.karmascore_set: |
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146 |
if k.score == -1: |
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147 |
bad +=1 |
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148 |
elif k.score == 1: |
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149 |
good +=1 |
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150 |
self._karma_total_good, self._karma_total_bad = good, bad |
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151 |
|
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152 |
def get_good_karma_total(self): |
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153 |
if not hasattr(self, "_karma_total_good"): |
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|
154 |
self._fill_karma_cache() |
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155 |
return self._karma_total_good |
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|
156 |
|
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157 |
def get_bad_karma_total(self): |
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|
158 |
if not hasattr(self, "_karma_total_bad"): |
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|
159 |
self._fill_karma_cache() |
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|
160 |
return self._karma_total_bad |
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|
161 |
|
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|
162 |
def get_karma_total(self): |
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|
163 |
if not hasattr(self, "_karma_total_good") or not hasattr(self, "_karma_total_bad"): |
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|
164 |
self._fill_karma_cache() |
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|
165 |
return self._karma_total_good + self._karma_total_bad |
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|
166 |
|
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|
167 |
def get_as_text(self): |
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|
168 |
return _('Posted by %(user)s at %(date)s\n\n%(comment)s\n\nhttp://%(domain)s%(url)s') % \ |
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169 |
{'user': self.user.username, 'date': self.submit_date, |
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170 |
'comment': self.comment, 'domain': self.site.domain, 'url': self.get_absolute_url()} |
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|
171 |
|
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|
172 |
|
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|
173 |
class FreeComment(models.Model): |
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|
174 |
"""A comment by a non-registered user.""" |
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|
175 |
content_type = models.ForeignKey(ContentType) |
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|
176 |
object_id = models.IntegerField(_('object ID')) |
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|
177 |
comment = models.TextField(_('comment'), max_length=3000) |
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|
178 |
person_name = models.CharField(_("person's name"), max_length=50) |
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|
179 |
submit_date = models.DateTimeField(_('date/time submitted'), auto_now_add=True) |
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|
180 |
is_public = models.BooleanField(_('is public')) |
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|
181 |
ip_address = models.IPAddressField(_('ip address')) |
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|
182 |
# TODO: Change this to is_removed, like Comment |
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|
183 |
approved = models.BooleanField(_('approved by staff')) |
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|
184 |
site = models.ForeignKey(Site) |
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|
185 |
|
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|
186 |
class Meta: |
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|
187 |
verbose_name = _('free comment') |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
188 |
verbose_name_plural = _('free comments') |
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|
189 |
ordering = ('-submit_date',) |
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|
190 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
191 |
class Admin: |
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|
192 |
fields = ( |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
193 |
(None, {'fields': ('content_type', 'object_id', 'site')}), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
194 |
('Content', {'fields': ('person_name', 'comment')}), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
195 |
('Meta', {'fields': ('submit_date', 'is_public', 'ip_address', 'approved')}), |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
196 |
) |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
197 |
list_display = ('person_name', 'submit_date', 'content_type', 'get_content_object') |
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|
198 |
list_filter = ('submit_date',) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
199 |
date_hierarchy = 'submit_date' |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
200 |
search_fields = ('comment', 'person_name') |
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|
201 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
202 |
def __unicode__(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
203 |
return "%s: %s..." % (self.person_name, self.comment[:100]) |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
204 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
205 |
def get_absolute_url(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
206 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
207 |
return self.get_content_object().get_absolute_url() + "#c" + str(self.id) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
208 |
except AttributeError: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
209 |
return "" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
210 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
211 |
def get_content_object(self): |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
212 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
213 |
Returns the object that this comment is a comment on. Returns None if |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
214 |
the object no longer exists. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
215 |
""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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changeset
|
216 |
from django.core.exceptions import ObjectDoesNotExist |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
217 |
try: |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
218 |
return self.content_type.get_object_for_this_type(pk=self.object_id) |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
219 |
except ObjectDoesNotExist: |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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|
220 |
return None |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
221 |
|
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
222 |
get_content_object.short_description = _('Content object') |
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class KarmaScoreManager(models.Manager): |
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def vote(self, user_id, comment_id, score): |
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try: |
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karma = self.get(comment__pk=comment_id, user__pk=user_id) |
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except self.model.DoesNotExist: |
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karma = self.model(None, user_id=user_id, comment_id=comment_id, score=score, scored_date=datetime.datetime.now()) |
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karma.save() |
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else: |
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karma.score = score |
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karma.scored_date = datetime.datetime.now() |
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karma.save() |
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def get_pretty_score(self, score): |
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""" |
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Given a score between -1 and 1 (inclusive), returns the same score on a |
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scale between 1 and 10 (inclusive), as an integer. |
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""" |
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if score is None: |
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return DEFAULT_KARMA |
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return int(round((4.5 * score) + 5.5)) |
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class KarmaScore(models.Model): |
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user = models.ForeignKey(User) |
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comment = models.ForeignKey(Comment) |
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score = models.SmallIntegerField(_('score'), db_index=True) |
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scored_date = models.DateTimeField(_('score date'), auto_now=True) |
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objects = KarmaScoreManager() |
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class Meta: |
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verbose_name = _('karma score') |
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verbose_name_plural = _('karma scores') |
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unique_together = (('user', 'comment'),) |
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def __unicode__(self): |
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return _("%(score)d rating by %(user)s") % {'score': self.score, 'user': self.user} |
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class UserFlagManager(models.Manager): |
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def flag(self, comment, user): |
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""" |
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Flags the given comment by the given user. If the comment has already |
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been flagged by the user, or it was a comment posted by the user, |
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nothing happens. |
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""" |
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if int(comment.user_id) == int(user.id): |
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return # A user can't flag his own comment. Fail silently. |
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try: |
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f = self.get(user__pk=user.id, comment__pk=comment.id) |
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except self.model.DoesNotExist: |
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from django.core.mail import mail_managers |
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f = self.model(None, user.id, comment.id, None) |
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message = _('This comment was flagged by %(user)s:\n\n%(text)s') % {'user': user.username, 'text': comment.get_as_text()} |
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mail_managers('Comment flagged', message, fail_silently=True) |
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f.save() |
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class UserFlag(models.Model): |
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user = models.ForeignKey(User) |
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comment = models.ForeignKey(Comment) |
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flag_date = models.DateTimeField(_('flag date'), auto_now_add=True) |
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objects = UserFlagManager() |
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class Meta: |
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verbose_name = _('user flag') |
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verbose_name_plural = _('user flags') |
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unique_together = (('user', 'comment'),) |
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def __unicode__(self): |
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return _("Flag by %r") % self.user |
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class ModeratorDeletion(models.Model): |
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user = models.ForeignKey(User, verbose_name='moderator') |
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comment = models.ForeignKey(Comment) |
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deletion_date = models.DateTimeField(_('deletion date'), auto_now_add=True) |
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class Meta: |
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verbose_name = _('moderator deletion') |
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verbose_name_plural = _('moderator deletions') |
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unique_together = (('user', 'comment'),) |
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def __unicode__(self): |
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return _("Moderator deletion by %r") % self.user |