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import datetime
from django.db import models
class VoteManager(models.Manager):
def get_up_vote_count_from_user(self, user):
if user is not None:
return self.filter(user=user, vote=1).count()
else:
return 0
def get_down_vote_count_from_user(self, user):
if user is not None:
return self.filter(user=user, vote=-1).count()
else:
return 0
def get_votes_count_today_from_user(self, user):
if user is not None:
today = datetime.date.today()
return self.filter(user=user, voted_at__range=(today, today + datetime.timedelta(1))).count()
else:
return 0
class Vote(models.Model):
VOTE_UP = +1
VOTE_DOWN = -1
VOTE_CHOICES = (
(VOTE_UP, u'Up'),
(VOTE_DOWN, u'Down'),
)
user = models.ForeignKey('auth.User', related_name='votes')
voted_post = models.ForeignKey('Post', related_name='votes')
vote = models.SmallIntegerField(choices=VOTE_CHOICES)
voted_at = models.DateTimeField(default=datetime.datetime.now)
objects = VoteManager()
class Meta:
unique_together = ('user', 'voted_post')
app_label = 'askbot'
db_table = u'vote'
def __unicode__(self):
return '[%s] voted at %s: %s' %(self.user, self.voted_at, self.vote)
def __int__(self):
"""1 if upvote -1 if downvote"""
return self.vote
def is_upvote(self):
return self.vote == self.VOTE_UP
def is_downvote(self):
return self.vote == self.VOTE_DOWN
def is_opposite(self, vote_type):
assert(vote_type in (self.VOTE_UP, self.VOTE_DOWN))
return self.vote != vote_type
def cancel(self):
"""cancel the vote
while taking into account whether vote was up
or down
return change in score on the post
"""
#importing locally because of circular dependency
from askbot import auth
score_before = self.voted_post.score
if self.vote > 0:
# cancel upvote
auth.onUpVotedCanceled(self, self.voted_post, self.user)
else:
# cancel downvote
auth.onDownVotedCanceled(self, self.voted_post, self.user)
score_after = self.voted_post.score
return score_after - score_before
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