Rspec: change order by id into vote_sum in answer spec
rspec: order by vote_sum for answer
rspec: vote up and vote down
Initial answer_vote model
Add answer_votes migration
Add vote_sum field into answers table
Add default value of vote_sum
Initial answer_votes controller
Add up and down in answer_vote model
change kind_changed into kind_changed?
Rspec: Fix answer_vote
rspec: up, down, vote_sum
vote up, vote down done
rspec: has_voted_by
Fix answer rspec
Cancel vote