def post(self):
answer_id = self.get_argument("answer_id")
print "answer_id", answer_id
vote_value = self.get_argument("value")
print "vote_value", vote_value
answer_info = Answer.queryById(answer_id)
userId = self.get_current_user_id()
# 获取投票信息
vote_info = AnswerVote.queryByAnswerIdAndUserId(answer_id, userId)
# 赞同投票结果分三种情况
# 情况一 没有投过票，增加一条投票记录
if not vote_info:
print "vote_info", vote_info
AnswerVote.addAnswerVote(answer_id, answer_info.uid, userId, vote_value)
# 情况二 已经投过赞同票，则删除赞同记录（已经头赞同票，再点一次是为了取消赞同）
else:
print "vote_info.vote_value", vote_info.vote_value
if vote_info.vote_value == int(vote_value):
print "already vote"
AnswerVote.deleteByVoterId(vote_info.voter_id)
# 情况三 已经投反对票的，将反对票更新为赞同票
if vote_info.vote_value != int(vote_value):
print "against"
AnswerVote.updateByVoterId(vote_info.voter_id, vote_value)
# 统计总票数
agree_count = AnswerVote.countByAnswerIdAndType(answer_id, 1)
against_count = AnswerVote.countByAnswerIdAndType(answer_id, -1)
# 更新answer投票数
Answer.updateVoteByAnswerId(answer_id, vote_value, against_count, agree_count)
print answer_info.uid
print answer_info.answer_content
