def check_downvote(self, vote_kind):
"""Checks whether this account has enough karma to cast a downvote.
vote_kind is 'link' or 'comment' depending on the type of vote that's
being cast.
This makes the assumption that the user can't cast a vote for something
on the non-current subreddit.
"""
from r2.models.vote import Vote, Link, Comment
def get_cached_downvotes(content_cls):
kind = content_cls.__name__.lower()
downvotes = g.cache.get(self.vote_cache_key(kind))
if downvotes is None:
vote_cls = Vote.rel(Account, content_cls)
downvotes = len(list(vote_cls._query(Vote.c._thing1_id == self._id,
Vote.c._name == str(-1))))
g.cache.set(self.vote_cache_key(kind), downvotes)
return downvotes
link_downvote_karma = get_cached_downvotes(Link) * c.current_or_default_sr.post_karma_multiplier
comment_downvote_karma = get_cached_downvotes(Comment)
karma_spent = link_downvote_karma + comment_downvote_karma
karma_balance = self.safe_karma * 4
vote_cost = c.current_or_default_sr.post_karma_multiplier if vote_kind == 'link' else 1
if karma_spent + vote_cost > karma_balance:
points_needed = abs(karma_balance - karma_spent - vote_cost)
msg = strings.not_enough_downvote_karma % (points_needed, plurals.N_points(points_needed))
raise NotEnoughKarma(msg)
def check_downvote(self, vote_kind):
"""Checks whether this account has enough karma to cast a downvote.
vote_kind is 'link' or 'comment' depending on the type of vote that's
being cast.
This makes the assumption that the user can't cast a vote for something
on the non-current subreddit.
"""
raise NotEnoughKarma('Downvoting temporarily disabled.')
from r2.models.vote import Vote, Link, Comment
def get_cached_downvotes(content_cls):
kind = content_cls.__name__.lower()
cache_key = self.downvote_cache_key(kind)
downvotes = g.cache.get(cache_key)
if downvotes is None:
vote_cls = Vote.rel(Account, content_cls)
# Get a count of content_cls downvotes
type = tdb.rel_types_id[vote_cls._type_id]
# rt = rel table
# dt = data table
# tt = thing table
rt, account_tt, content_cls_tt, dt = type.rel_table
cols = [sa.func.count(rt.c.rel_id)]
where = sa.and_(rt.c.thing1_id == self._id, rt.c.name == '-1')
query = sa.select(cols, where)
downvotes = query.execute().scalar()
g.cache.set(cache_key, downvotes)
return downvotes
link_downvote_karma = get_cached_downvotes(
Link) * c.current_or_default_sr.post_karma_multiplier
comment_downvote_karma = get_cached_downvotes(Comment)
karma_spent = link_downvote_karma + comment_downvote_karma
karma_balance = self.safe_karma * 4
vote_cost = c.current_or_default_sr.post_karma_multiplier if vote_kind == 'link' else 1
vote_cost *= self.vote_multiplier
if karma_spent + vote_cost > karma_balance:
points_needed = abs(karma_balance - karma_spent - vote_cost)
msg = strings.not_enough_downvote_karma % (
points_needed, plurals.N_points(points_needed))
raise NotEnoughKarma(msg)